I bought this book for my 12 year old daughter for Christmas, who has enjoyed the earlier editions of this series. So I was very disappointed, in reading through it, that there are several references to sexual things, both slang and direct, which I don't feel are at all appropriate. The earlier books, to my recollection, are much more G-rated. It really ruined my enjoyment of it personally, and I regretfully put the book away as I do not want it in my daughter's library.
I believe the author has enough signs sent to him to choose from, that he can make his next book with humor everyone can enjoy.