Good Books on Design Patterns

There are different ways in which people appreciate design patterns.
Some do it in extremely theoretical ways while some do it in extremely practical ways.
Some experience an "Aha!" moment when they finally see the great power of the patterns - when they finally realise the exact design patterns which would help them with the task at their work.
Design Patterns help us to welcome change rather than fighting with it.
Finding the right book on the subject is very important.
Below are the four books that I would recommend.

1. Design Patterns -Elements of Reusable Object-Oriented Software - GoF -Pearson Education Publication
   
2. Head First Design Patterns- Elisabeth Freeman, Eric Freeman, Kathy Sierra and Bert Bates -O'relliy Publication
3. Holub on Patterns-Learing Patterns by Looking at Code -Allen Holub- Apress Publication
   
4. Java Design Patterns-James Cooper-Pearson Education Publication