Richard Overy. The Morbid Age: Britain Between the Wars London: Allen Lane, 2009. One I've been looking forward to getting my hands on! It's not a general history of the 1920s and 1930s, but more a history of ideas, with a particular focus on (as the title suggests) pessimistic ones. There are a couple of chapters on pacifism which look especially interesting. And while it's not profusely illustrated, the pictures are well-chosen: the one on the back cover of the Southwark Spain Shop ('Buy a tin of food! We will send it to Spain') is worth at least a thousand words.
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