In this work, the master of Christian apology tackles a difficult subject: miracles. The question is easy enough--do miracles really occur?--but the answer is far more complex and difficult. True to his style, Lewis picks apart the question and analyzes it with the scrutinizing eye of a skeptic who has seen the light and wants to help others see it too.
The scope, of course, goes far beyond miracles. In analyzing the probability of such events, Lewis examines Pantheism vs. Christianity, and the idea of a Nature that is completely independent of any outside interference (even God's). His argument that the laws and 'nature' of Nature are not violated by miracles is convincing, as is his argument that miracles are, in fact, necessary. For Lewis, a miracle wrought by the Creator of mankind is really nothing extraordinary. Some miracles, such as the water being turned into wine, simply skip a step or two. Instead of water nourishing a vine that eventually produces grapes for wine, Christ merely eliminates the intermediary steps. Other miracles, such as Christ's Resurrection, are simply a glance at what's to come, when everyone will be resurrected.
Whether or not you agree with Lewis, his argument is worth considering. Like most of his work, this book is written for believer and skeptic alike, and provides a stimulating analysis of the probability of miracles occurring. This one belongs on the shelf of any Christian thinker, and will prove a stimulating read for students of philosophy as well.