Exactly a year back I had written about the same topic, and over the time I have picked up a few more books, that I am sharing here. Like the earlier post I will let the books do the talking.

xUnit Test Patterns : Refactoring Test Code
Growing Object-Oriented Software, Guided by Tests
Clean Code: A Handbook of Agile Software Craftsmanship

Release It!: Design and Deploy Production-Ready Software

Enterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions
Design Patterns: Elements of Reusable Object-Oriented Software

Working Effectively with Legacy Code
Framework Design Guidelines: Conventions, Idioms, and Patterns for Reusable .NET Libraries

Have a great year ahead and some good reading.

* The links are Amazon Affiliate Links!