The book totes are new this season and do not have a zip, however the Hamptons Carryalls (all sizes) have zippers. It's funny my Mom went on and on about her first Coach having a zipper. (She got a black Hamptons medium carryall) and guess what, SHE NEVER USES THE ZIPPER. LOL.
For school you might want to look into either the Medium or Large Carryall or the Business Tote:
My Mom tried to love the Booktote, (she got the embossed leather version) but found the size wasn't working for her, she went for the Medium Carry-all in the same print I have above. (For the record, her everyday bag is an LV BH).
I want the LV BH as well!! I was looking at the Coach BookTote because I thought it was roomy but it may not be. I may need that business tote instead.