Very clever, and especially fun if you know a lot about nursery rhymes. This is the crime story version of what really happened to Humpty Dumpty when he sat on the wall.
There is a town where nursery rhyme characters live and interactive with normal people. Given the unique problems and issues this segment of the population deals with, a division of the police force is put in charge of solving crimes relating to this minority group. Some of the police in this division are nursery rhyme characters themselves, allowing them to really understand the culture.
In this story you get to know Humpty Dumpty, who it turns out is a womanizer who was really more clever with money that you’d probably have given him credit for. When he turns up in pieces at the bottom of his sitting wall, the Nursery Crime division is called in. Detective Jack Spratt takes the case, and even though sometimes he seems to bumble his way through it like Inspector Gadget would, he is very tenacious about getting the bad guy(s). There are plenty of great laughs along the way, and this book would be suitable for any child old enough to understand the language its written in.
It is written as a true crime story, but with a tongue-in-cheek feel to it that will keep you amused. There is also a sequel, called The Fourth Bear, that I recommend.