C# in depth
This has got to be the definition of awesome. You read a really cool book about a subject close to your heart, and you get to talk to the author! How cool is that? What did we have when we didn’t have blogs?
Obligatory endorsement: if you call yourself a C# programmer, go read the book. It focuses on the language, not the framework, and that’s what makes it special. C# is a great language, every C# dev owes it to themselves to learn its ins and outs.