diff --git a/src/code/ca/bcit/comp2522/lab04/Author.java b/src/code/ca/bcit/comp2522/lab04/Author.java
index 87d673d..4474250 100644
--- a/src/code/ca/bcit/comp2522/lab04/Author.java
+++ b/src/code/ca/bcit/comp2522/lab04/Author.java
@@ -10,7 +10,7 @@ package ca.bcit.comp2522.lab04;
  * @author Calvin Arifianto
  * @version 1.0.0
  */
-public class Author extends Person {
+public class Author extends Person implements Printable{
     private static final int MAX_GENRE_LENGTH = 30;
 
     private final String genre;
@@ -34,4 +34,23 @@ public class Author extends Person {
 
         this.genre = genre;
     }
+
+    @Override
+    public void display() {
+
+        StringBuilder builder;
+        builder = new StringBuilder();
+
+        builder.append("Name: ");
+        builder.append(this.name.getFullName());
+        builder.append("\nDate of Birth: ");
+        builder.append(this.dateOfBirth);
+        builder.append("\nDate of Death: ");
+        builder.append(this.dateOfDeath);
+        builder.append("\nGenre: ");
+        builder.append(this.genre);
+
+
+        System.out.println(builder.toString());
+    }
 }
diff --git a/src/code/ca/bcit/comp2522/lab04/Autobiography.java b/src/code/ca/bcit/comp2522/lab04/Autobiography.java
index 7f83566..061da89 100644
--- a/src/code/ca/bcit/comp2522/lab04/Autobiography.java
+++ b/src/code/ca/bcit/comp2522/lab04/Autobiography.java
@@ -10,7 +10,7 @@ package ca.bcit.comp2522.lab04;
  * @author Calvin Arifianto
  * @version 1.0.0
  */
-public class Autobiography extends Biography
+public class Autobiography extends Biography implements Printable
 {
     /**
      * Autobiography constructor
@@ -25,4 +25,23 @@ public class Autobiography extends Biography
     ) {
         super(title, year, author, author);
     }
+
+    @Override
+    public void display() {
+
+        StringBuilder builder;
+        builder = new StringBuilder();
+
+        builder.append("Title: ");
+        builder.append(this.title);
+        builder.append(" - Year: ");
+        builder.append(this.year);
+        builder.append(" - Author: ");
+        builder.append(this.author.getFullName());
+        builder.append(" - Subject: ");
+        builder.append(this.subject.getFullName());
+
+
+        System.out.println(builder.toString());
+    }
 }
diff --git a/src/code/ca/bcit/comp2522/lab04/Biography.java b/src/code/ca/bcit/comp2522/lab04/Biography.java
index 1d8eab2..1b4315b 100644
--- a/src/code/ca/bcit/comp2522/lab04/Biography.java
+++ b/src/code/ca/bcit/comp2522/lab04/Biography.java
@@ -9,9 +9,9 @@ package ca.bcit.comp2522.lab04;
  * @author Calvin Arifianto
  * @version 1.0.0
  */
-public class Biography extends Book
+public class Biography extends Book implements Printable
 {
-    private final Person subject;
+    final Person subject;
 
     /**
      * Biography constructor
@@ -32,4 +32,52 @@ public class Biography extends Book
 
         this.subject = subject;
     }
+
+    @Override
+    public boolean equals(Object o) {
+
+        if (o == null || getClass() != o.getClass())
+        {
+            return false;
+        }
+
+        Biography other;
+        other = (Biography)o;
+
+        if (this == o)
+        {
+            return true;
+        }
+
+        return this.subject.equals(other.subject);
+    }
+
+    @Override
+    public int hashCode() {
+        if(subject == null)
+        {
+            return 0;
+        }
+        return subject.hashCode();
+    }
+
+
+    @Override
+    public void display() {
+
+        StringBuilder builder;
+        builder = new StringBuilder();
+
+        builder.append("Title: ");
+        builder.append(this.title);
+        builder.append("\nYear: ");
+        builder.append(this.year);
+        builder.append("\nAuthor: ");
+        builder.append(this.author.getFullName());
+        builder.append("\nSubject: ");
+        builder.append(this.subject.getFullName());
+
+
+        System.out.println(builder.toString());
+    }
 }
diff --git a/src/code/ca/bcit/comp2522/lab04/Book.java b/src/code/ca/bcit/comp2522/lab04/Book.java
index 203e399..fd50405 100644
--- a/src/code/ca/bcit/comp2522/lab04/Book.java
+++ b/src/code/ca/bcit/comp2522/lab04/Book.java
@@ -12,14 +12,17 @@ package ca.bcit.comp2522.lab04;
  * @version 1.0.0
  */
 public class Book
+        implements  Comparable<Book>,
+                    Printable,
+                    Reversible
 {
     private static final int MAX_TITLE_LENGTH = 100;
     private static final int MIN_YEAR         = 1;
     private static final int MAX_YEAR         = 2025;
 
-    private final String title;
-    private final int    year;
-    private final Author author;
+    protected final String title;
+    protected final int    year;
+    protected final Author author;
 
     /**
      * Book constructor
@@ -40,4 +43,45 @@ public class Book
         this.year = year;
         this.author = author;
     }
+
+    @Override
+    public void display() {
+
+        StringBuilder builder;
+        builder = new StringBuilder();
+
+        builder.append("Title: ");
+        builder.append(this.title);
+        builder.append("\nYear: ");
+        builder.append(this.year);
+        builder.append("\nAuthor: ");
+        builder.append(this.author.getFullName());
+
+
+        System.out.println(builder.toString());
+    }
+
+    @Override
+    public void backward()
+    {
+        final StringBuilder builder;
+        builder =  new StringBuilder();
+
+        for (int i = this.title.length() - 1; i >= 0; i--) {
+            builder.append(title.charAt(i));
+        }
+
+        System.out.println(builder.toString());
+    }
+
+    @Override
+    public int compareTo(Book other) {
+        if (this.year < other.year) {
+            return -1;
+        } else if (this.year > other.year) {
+            return 1;
+        }
+
+        return 0;
+    }
 }
diff --git a/src/code/ca/bcit/comp2522/lab04/Date.java b/src/code/ca/bcit/comp2522/lab04/Date.java
index 8cbfd91..0b9c9a7 100644
--- a/src/code/ca/bcit/comp2522/lab04/Date.java
+++ b/src/code/ca/bcit/comp2522/lab04/Date.java
@@ -11,11 +11,11 @@ package ca.bcit.comp2522.lab04;
  * @author Calvin Arifianto
  * @version 1.0.0
  */
-public final class Date implements Printable
+public final class Date implements Printable, Comparable<Date>
 {
 
     // Domain of dates
-    private static final int MIN_YEAR = 1800;
+    private static final int MIN_YEAR = 1500;
     private static final int MAX_YEAR = 2025;
     private static final int MIN_DAY  = 1;
 
@@ -395,4 +395,30 @@ public final class Date implements Printable
     public void display() {
         System.out.println(getYyyyMmDd());
     }
+
+    /**
+     * Compares two dates, the older is the "largest"/"bigger"
+     */
+    @Override
+    public int compareTo(Date other) {
+        if (this.year < other.year) {
+            return -1;
+        } else if (this.year > other.year) {
+            return 1;
+        }
+
+        if (this.month < other.month) {
+            return -1;
+        } else if (this.month > other.month) {
+            return 1;
+        }
+
+        if (this.day < other.day) {
+            return -1;
+        } else if (this.day > other.day) {
+            return 1;
+        }
+
+        return 0; // years, months, and days are all equal
+    }
 }
diff --git a/src/code/ca/bcit/comp2522/lab04/Main.java b/src/code/ca/bcit/comp2522/lab04/Main.java
new file mode 100644
index 0000000..ee6bc61
--- /dev/null
+++ b/src/code/ca/bcit/comp2522/lab04/Main.java
@@ -0,0 +1,115 @@
+package ca.bcit.comp2522.lab04;
+
+public class Main {
+    public static void main(final String[] args) {
+
+        Author author1;
+        Name nameAuthor1;
+        Date birthAuthor1;
+        Date deathAuthor1;
+
+        nameAuthor1 = new Name("George", "Orwell");
+        birthAuthor1 = new Date(1903,6,25);
+        deathAuthor1 = new Date(1950,1,21);
+
+        author1 = new Author(nameAuthor1,birthAuthor1,deathAuthor1, "Dystopia");
+
+
+        Author author2;
+        Name nameAuthor2;
+        Date birthAuthor2;
+        Date deathAuthor2;
+
+        nameAuthor2 = new Name("Harper", "Lee");
+        birthAuthor2 = new Date(1926,4,28);
+        deathAuthor2 = new Date(2016,2,19);
+
+        author2 = new Author(nameAuthor2,birthAuthor2,deathAuthor2, "Literature/fiction");
+
+        Author author3;
+        Name nameAuthor3;
+        Date birthAuthor3;
+        Date deathAuthor3;
+
+        nameAuthor3 = new Name("Jane", "Austen");
+        birthAuthor3 = new Date(1775,12,16);
+        deathAuthor3 = new Date(1817,7,18);
+
+        author3 = new Author(nameAuthor3,birthAuthor3,deathAuthor3, "Literary realism");
+
+
+        Author author4;
+        Name nameAuthor4;
+        Date birthAuthor4;
+        Date deathAuthor4;
+
+        nameAuthor4 = new Name("F. Scott", "Fitzgerald");
+        birthAuthor4 = new Date(1896,9,24);
+        deathAuthor4 = new Date(1940,12,21);
+
+        author4 = new Author(nameAuthor4,birthAuthor4,deathAuthor4, "Modernist fiction");
+
+        Author author5;
+        Name nameAuthor5;
+        Date birthAuthor5;
+        Date deathAuthor5;
+
+        nameAuthor5 = new Name("Herman", "Melville");
+        birthAuthor5 = new Date(1819,8,1);
+        deathAuthor5 = new Date(1891,9,28);
+
+        author5 = new Author(nameAuthor5,birthAuthor5,deathAuthor5, "Travelogue");
+
+        Book book1;
+        Book book2;
+        Book book3;
+        Book book4;
+        Book book5;
+
+        book1 = new Book("1984",                  1949, author1);
+        book2 = new Book("To Kill a Mockingbird", 1960, author2);
+        book3 = new Book("Pride and Prejudice",   1813, author3);
+        book4 = new Book("The Great Gatsby",      1925, author4);
+        book5 = new Book("Moby-Dick",             1851, author5);
+
+        Author biographyAuthor1;
+
+        Name nameBiographyAuthor1;
+        Date birthBiographyAuthor1;
+        Date deathBiographyAuthor1;
+
+        nameBiographyAuthor1 = new Name("Robert","Caro");
+        birthBiographyAuthor1 = new Date(1935,10,30);
+        deathBiographyAuthor1 = new Date(1935,10,30);
+
+        Person biographySubject1;
+
+        Name nameBiographySubject1;
+        Date birthBiographySubject1;
+        Date deathBiographySubject1;
+
+        nameBiographySubject1 = new Name("Robert","Moses");
+        birthBiographySubject1 = new Date(1888,12,18);
+        deathBiographySubject1 = new Date(1981,7, 29);
+
+        biographyAuthor1 = new Author(nameBiographyAuthor1,birthBiographyAuthor1, deathBiographyAuthor1, "Biography");
+        biographySubject1 = new Person(birthBiographySubject1, deathBiographySubject1, nameBiographySubject1);
+
+        Biography biography1;
+        Biography biography2;
+        Biography biography3;
+        Biography biography4;
+        Biography biography5;
+
+        biography1 = new Biography("The Power Broker", 1974, biographyAuthor1, biographySubject1);
+
+        Autobiography AutoBio1;
+        Autobiography AutoBio2;
+        Autobiography AutoBio3;
+        Autobiography AutoBio4;
+        Autobiography AutoBio5;
+
+
+
+    }
+}
diff --git a/src/code/ca/bcit/comp2522/lab04/Name.java b/src/code/ca/bcit/comp2522/lab04/Name.java
index cef4d71..808a73c 100644
--- a/src/code/ca/bcit/comp2522/lab04/Name.java
+++ b/src/code/ca/bcit/comp2522/lab04/Name.java
@@ -31,9 +31,13 @@ public class Name implements Printable
         this.last = last;
     }
 
+    protected String getFullName(){
+        return this.first + " " + this.last;
+    }
+
     @Override
     public void display()
     {
-        System.out.println("First: " + first + " Last: " + last);
+        System.out.println(first + " " + last);
     }
 }
diff --git a/src/code/ca/bcit/comp2522/lab04/Person.java b/src/code/ca/bcit/comp2522/lab04/Person.java
index 1595b14..e3aa771 100644
--- a/src/code/ca/bcit/comp2522/lab04/Person.java
+++ b/src/code/ca/bcit/comp2522/lab04/Person.java
@@ -12,10 +12,13 @@ package ca.bcit.comp2522.lab04;
  * @version 1.0.0
  */
 public class Person
+        implements  Comparable<Person>,
+                    Printable,
+                    Reversible
 {
-    private final Date dateOfBirth;
-    private final Date dateOfDeath;
-    private final Name name;
+    protected final Date dateOfBirth;
+    protected final Date dateOfDeath;
+    protected final Name name;
 
     /**
      * Person construct
@@ -35,4 +38,46 @@ public class Person
         this.dateOfDeath = dateOfDeath;
         this.name = name;
     }
+
+    public String getFullName(){
+        return this.name.getFullName();
+    }
+
+    @Override
+    public void display() {
+
+        StringBuilder builder;
+        builder = new StringBuilder();
+
+        builder.append("Date of Birth: ");
+        builder.append(this.dateOfBirth);
+        builder.append("\nDate of Death: ");
+        builder.append(this.dateOfDeath);
+        builder.append("\nName: ");
+        builder.append(this.name.getFullName());
+
+        System.out.println(builder.toString());
+    }
+
+    @Override
+    public void backward()
+    {
+        final StringBuilder builder;
+        final String fullName;
+
+        builder =  new StringBuilder();
+        fullName = this.name.getFullName();
+
+        for (int i = fullName.length() - 1; i >= 0; i--) {
+            builder.append(fullName.charAt(i));
+        }
+
+        System.out.println(builder.toString());
+    }
+
+
+    @Override
+    public int compareTo(Person other) {
+        return this.dateOfBirth.compareTo(other.dateOfBirth);
+    }
 }