I do love reading cookbooks, those places in cookbooks where the author talks about cuisine or whatever he or she wants relevant to that, letting me into a window of the world they're cooking in.
Right off the top of my head:
- Phoenix Claws and Jade Trees - Chinese.  By Kian Lam Kho.
- How to Roast a Lamb - Greek.  By Michael Psilakis.
I know I have more, not going through the collection at the moment.  But:
My newest cookbook, which I have yet to crack effectively, is Autentico, by Rolando Beramendi (Italian).  It looks like I'll get some reading pleasure out of this one, too.  (One reason I wanted this book wasn't so much for the discussions or the readability, but that I'm rather unimpressed with most Americanized Italian restaurants I've been in lately.  I wanna cook something GOOD from that background!)
And then there are people who write ABOUT food, and only incidentally drop in recipes, perhaps to illustrate points.  The most recent book I have acquired in this genre is The Cooking Gene, by Michael Twitty (African American/Southern).