Big Over Easy, The (Nursery Crime #1) by Jasper Fforde; 2006. Softcover.

Jasper Fforde's bestselling Thursday Next series has delighted readers of every genre with its literary derring-do and brilliant flights of fancy. In The Big Over Easy, Fforde takes a break from classic literature and tumbles into the seedy underbelly of nursery crime. Meet Inspector Jack Spratt, family man and head of the Nursery Crime Division. He's investigating the murder of ovoid D-class nursery celebrity Humpty Dumpty, found shattered to death beneath a wall in a shabby area of town. Yes, the big egg is down, and all those brittle pieces sitting in the morgue point to foul play.