I'm an editor at a history/social studies textbook publishing company in Connecticut. I had an internship in college at Cambidge University Press in NYC, and then got hired here as an editorial assistant. Working for a small company like mine has major advantages -- I filed and copied for about two months, and then, whoosh! They ran out of editors for a project, and I got sucked in, and haven't gone back to grunt work since. Textbooks aren't where I want stay forever, but I've learned a LOT about project management, writing (writing for kids will clean up your writing in a HURRY -- no hiding behind facy, vague turns of phrase), and editing. Another great thing about the textbok industry is that the books belong to the editors, not the writers. And you write A LOT of stuff because, well, then the company doesn't have to hire a writer. ;)