This book presents a series of studies by the late Marilyn McCord Adams of medieval philosophical and theological views regarding the powers that govern human psychological processes. She explores which of them were taken to be ours to exercise and control, and which to be controlled and exercised only by God. I find most of the interpretative claims that Adams defends in Housing the Powers convincing. I am confident that her book will soon become standard reading for anyone working on Latin medieval theories of causal powers.