For Children’s Literature: Independent Information and Reviews:

http://www.childrenslit.com/childrenslit/home.html

They do a lot of non-fiction, especially for the educational market.

I did my first stack a couple of weeks ago, and have another batch to do before Spain. They didn’t have a military reviewer, and they had a huge stack of military books, so that was right up my alley. I’m hoping for some on language, culture, and history soon too.