The Problem of Pain - C.S. Lewis In the introduction to the book, Lewis mentions that this is part of a series of books written by a variety of people. It would be interesting to know what the series was, in order to know more about the audience he was writing for. Clearly, Lewis expected his audience to be fairly well-versed in theology and philosophy (best to know Hegelian from Kantian thought), making the book a bit of a challenge for the average modern reader.

It's very much a Christian book. This book does not attempt to address why we suffer in general, but rather how the Christian should view the problem of suffering.