More than one book of "Al Hazir's Heavy Tomes" will drop in the Searing Sands Inn in the Caldeum Bazaar in Act 2. This is contrary to how only one book drops each time at all other locations.

In the hidden camp in Act 2, if you click on Leah's journal you'll get one journal at a time, the one corresponding to what quest you're on. But if you go to the Inn you can get all the books up to the quest you are on.

Ex: If I'm on quest 3 I get Leah's journal 12, and only 12. Not 10, 11, and 12. But if I go to the Inn I can get Heavy Tomes 1,2, and 3.

So basically I can not go to the Inn at all during Act 2, go there right before I go to Act 3 and get all the books in 1 shot. This doesn't seem to be what is intended judging from how all the other journals and books drop.