I just noticed  Mitch posted a review of the Framework Design Guidelines.   

.NET Framework Design Guidelines (Book Review)

Mitch gives an interesting categorization of types of tech books... While clearly our foundation in this book is towards .NET Development, I hope time will show it is more timeless than that.   When we built the Microsoft Ajax Library we found the guidelines here (in spirit) to be very helpful.  And, as I have recently noted Joshua Block of Java fame seems to share many of the same sentiments.

I love the quotes Mitch pull out from Anders:

“I have always felt that a key characteristic of a framework must be consistency”

Thanks for a well written review Mitch!