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Dig Deep into Object-Oriented Programming

Learn design patterns, application architecture and clean code from masters

Make sure you have basic understanding of Object-Oriented Programming since these books are not for beginners!

Head First Design Patterns

Design Patterns: Elements of Reusable Object-Oriented Software

Agile Software Development, Principles, Patterns, and Practices

Patterns of Enterprise Application Architecture

Clean Code: A Handbook of Agile Software Craftsmanship

Refactoring: Improving the Design of Existing Code

Domain-Driven Design: Tackling Complexity in the Heart of Software

The Pragmatic Programmer: From Journeyman to Master