This is my first post in the forum. I joined after getting this excellent book. I tried two other books and I believe they were another way for writing the manual. This book made me really understand not only the D90, but the digital world as well. I come from the film era, since 1979, and the D90 was the first entry to the digital photography. This book made it an easy move to a sophisticated world, at least from my point of view.