Taxi, a pair of photos, at left from a distance and above up close- from Little People in the City: The Street Art of Slinkachu (Boxtree, 128 pages, $19.99) For years, the London street artist calling himself Slinkachu has placed little figurines in public spaces, photographed them and then left them. This book collects more than 50 of the tiny tableaux- scenes mundane, comic, romantic and lewd - with an introduction from idiosyncratic British writer Will Self.