Aside from strategy guides and such - and the mediocre Final Fantasy and Philosophy, which I already have - are there any good books out there on JRPGs? I'm interested in things like their history and influences, and maybe in-depth information on the worlds of some specific games.

Mostly I'm interested in titles available in English, as that's the only language I can read. However, I'm mildly curious about titles in other languages as well.

(I'm aware of the existence of the Ultimania series, and some of them do sound like something I'd be interested in. But to the best of my knowledge they're only available in Japanese, some fan translation projects that never went much of anywhere notwithstanding.)