The Case of the Missing Books by Ian Sansom

Israel Armstrong is a passionate soul, lured to Ireland by the promise of an exciting new career. Alas, the job that awaits him is not quite what he had in mind. Still, Israel is not one to dwell on disappointment, as he prepares to drive a mobile library around a small, damp Irish town. After all, the scenery is lovely, the people are charming—but where are the books? The rolling library's 15,000 volumes have mysteriously gone missing, and it's up to Israel to discover who would steal them . . . and why. And perhaps, after that, he will tackle other bizarre and perplexing local mysteries—like, where does one go to find a proper cappuccino and a decent newspaper?