In the room with the locked door for the boney monster, all of the torches are unlit, except the one beside the locked door. Click on that torch to put it out...
The healer's book is hidden behind the hay stack in the left cell, with just a bit sticking out. If you do not see it (it should be easier to spot if you know where to look), move your cursor slowly down the left edge of the hay.
Beyond Divinity Strategy Guide
