From publisher blurb:
Welcome to 100 Oddities for a Wizard's Tower, the fifth entry in the “Oddities” series of sourcebooks, each of which brings you 100 imaginative elements, curios, and details to add to your games, in whatever way you like.
Oddities are intended to aid GM creativity, turning possibly bland areas or gaming episodes into something more, and the goal of this publication is to make things more fun and to take your imagination in directions it might not otherwise have gone. They fill in the corners of a bookshelf, a room, a level, a scenario, with all the sorts of things that add interest but take loads of time to come up with. A good oddity awakens curiosity and creativity, in player and GM alike, adding interest to an encounter, or even making one out of nothing.