Chris Stewart's books are always laugh aloud reading. Driving Over Lemons is, IMO, the funniest of the lot but I've read them all more than once ... and still laugh.
Another crack-you-up and LOL book about Spain is "A Load of Bull" by Tim Parfitt. He was a Brit working for Conde Nast Pub. in London in some rather menial position, was sent to Madrid for 6 weeks and ended up staying for years and being the managing director for Vogue Espana. Those who are learning Spanish will more than appreciate his writing.