All books are MUST read for .NET developers / architects or product managers (and even for SCRUM masters or XP practicionists)

1) Agile Principles, Patterns, and Practices in C# (Robert C. Martin Series) by Robert C. Martin
Read!!! If you not read this book (or same book for Java or C++) – you lost whole world!
MUST read book!

2) Code Complete 2: A Practical Handbook of Software Construction by Steve McConnell
No comments – same MUST read book, like was first edition!!!! For any developer / designer or architect! Book out in 2004, but looks like will be actual at least 4-5 more years, until author probably (and hopefully) will write 3-rd edition!

3) Getting Real by 37signals
Must read book (with a lot of essays) in case if you going to make your own business some day! Sure even if you not (i.e. just want to work for somebody and GET REAL results of your work) you also welcome to read it!

to be continue…