Based on the premise that if someone I work with asked me as I got in the lift - "what's your book, any good?" I'd be able to tell them before we got to the 8th floor without them wishing they'd never asked.
Guerra by Jason Webster. Slightly annoying English bloke is bored living in Spain, wants to find out about the Spanish Civil War. Book alternates chapters between a very breezy history (good) and tales of him playing keystone cops around the underbelly of Spanish society (hit and miss).
6 out of ten.