I'm a graduating senior in Illustration and I bought this book to use as a guideline for prices but when I brought it in to school all of my teachers, who are working illustrators them selves told me I wasted my money. They told me that this book is only useful as a first indication to someone like me who has literally no idea of what market value for different illustrations are but that the information in this book is obtained by surveys sent out to illustrators and designers. In some cases they got 4 back, 3 of which were from retired people, meaning that for that section the information is just 1 persons opinion, though it's presented as the final word on the situation. As a result of the book being compiled this way the prices almost never change or go up and this book is a large contributing factor to the fact that prices for illustration and design are still in the same place they were 20 years ago. This book is only good for someone who has no idea at all what to charge, but it does more harm then good and at the advice of every working illustrator and designer I've talked to it's a waste of money.