This little publication has become a staple in my gaming. I agree completely with all the positive comments by the other three reviewers, so I will not repeat them.
I will say that, beyond the core rule books, few items I have purchased have had such a significant impact on our game table experience with our gaming group. After character class and race, nothing shapes a player's actual perception of their adventuring world as much as the creatures they encounter.
Not only is it incredibly useful in creating creatures, the advice given at the end is worth the price of the book. But, wait, there's more: Not only is this book practical, it is highly entertaining.
You really can't go wrong with this one.
[5 of 5 Stars!]