"I figure we'll take the Invisibility and Jump potions; with that, we should be able to clear the wall, fairly easily, without being seen. Annella, if you can, try and sneak over the wall without being seen. If you don't think you can, I'll give you a potion, as well. From there, Annella scouts ahead, likely using the spider climb potion to move along the walls and ceiling, when possible, since they're less likely to be trapped, to try to find the book we're looking for."