Ten Second Staircase (Peculiar Crimes Unit Series #4)

It’s a crime tailor-made for the Peculiar Crimes Unit: a controversial artist is murdered and displayed as part of her own outrageous installation. No suspects, no motive, no evidence–it’s business as usual for the Unit’s cantankerous founding partners, Arthur Bryant and John May. But this time they have an eyewitness. According to twelve-year-old Luke Tripp, the killer was a cape-clad highwayman atop a black stallion.

As implausible as the boy’s story sounds, Bryant and May take it serious...