Serge Lidin has released an updated copy of his Masterring IL Assembler, the previous version of this book was amazing so I have very high expectations for the new edition. The new edition published by APress covers all of the additions made in 2.0 including generics.
If you use Reflection.Emit or spend time looking at underlying IL this book is a must read. If you don’t you will still learn a lot about how things work under the covers.
I will be providing a full review as soon as I can.