Mark Kurlansky has written two food related books in the last five years or so:
Salt: A World History
Cod: A Biography of a Fish that Changed the World
Both are nicely written, and the subject matters are just what the titles indicate. Of the two, I preferred Cod because the subject provides a more cohesive story. The European nations were all seeking the same fishing grounds and the competition was intense and important. Who knew that England and Iceland fought a minor war over Cod in the 20th century?
Salt takes on a more important subject, but the book is more a collection of facts and trivia about everyone's favorite seasoning. Kurlansky has a world wide scope that includes everything from government regulation of salt in ancient China to the role of salt in the U.S. Civil war. While a lot of the book does read as trivia, what great trivia. Who knew that all English cities with "wich" on the end meant they had a salt works?
If you want to read one of the two, it comes down to better (and shorter) story about a less critical subject versus a longer, less organized (and longer) book about one of the most critical food items of all time. For a non-fiction reader, both were pretty breezy reads.
Jonah