I started reading this series years ago. Just this year I ended up reading the last book out of order. Maybe that's why this book feels so flat. I enjoyed the first three books and found them funny. This one was a bit of a struggle. It just seems like more of the same tired old jokes, and gimmicks. Supposedly the characters are maturing, but they seem exactly the same to me. I had planned to go ahead and read the next book in the series so I'd be all finished, but I just can't bring myself to do it right now.