Design Patterns Explained Simply

If you have ever bought any programming books, you might have noticed that there are two types of them: books that are too short to understand the topic and books that are too long making it inevitable that you get bored. We've tried hard to avoid both of these categories with Design Patterns Explained Simply.
This book is fast and simple way to get the idea behind each of the 29 popular design patterns. The book is not tied to any specific programming language and will be good for you as long as you have a basic knowledge of OOP.