My 13 1/2-year old son and I read this book together. It presented thinking fallacies in such a way that made them fun to learn and easy to recognize, useful for long-term retention of the material. The targeted age (13+) was accurate.
My soon to be 9 year old is soaking this up, even though it was purchased for my 11 year old. We are ALL learning in a fun way about logic fallacies. I recommend this book for every person who wants to have honest communication and wants to spot those tricky fallacies.