out of 5
If you know anything at all about photography and your N90s, don't buy this book. It gives lengthy, wordy explainations of camera functions that are really very useless if you've spent any time at all playing with the features on you N90s. The section on flashes is good, but it's not a $20 book. If you must have it, do what I didn't: look over it in depth in the bookstore before you buy it, or find somebody selling it for what it's really worth: $5-$10.