I was very surprised to see some of the negative reviews that this book has received here. I am a recently qualified Latin teacher, and I have recent experience of Latin from both sides of the teacher / student divide. I found the book to be thoroughly entertaining and informative, occasionally downright hilarious, and it consistently held my attention.
I think the discrepancies in the reviews above are largely due to people's misguided expectations of the book. It is not (nor could it possibly be used as) a reference work by which one could expect to learn the language. Its audience is probably limited to those who already have a reasonable knowledge of Latin, and, put simply, the author aims to reward your knowledge (no matter how basic) with some clever 'in jokes' and literary references. He does so, in my opinion, with a good deal of skill and success.