Introductory philosophical texts tend to adopt one of two possible approaches: Either they give a chronological account of famous thinkers and schools, or they examine a set of topics - ethics, free will, nature of mind, etc. Craig opts for something different and rather interesting. The first three chapters are intended to be read in tandem with the works they summarize, namely Plato's "Crito", Hume's "On Miracles" and the Buddhist "King Milanda's Chariot". How many readers will actually do that is doubtful but it is an interesting idea that introduces the reader to three very different areas of philosophy.
We then, somewhat more traditionally, have summary introductions to some philosophical themes and 'isms'. Next, Craig presents reviews of a very personal selection of philosophical classics. 'Idiosyncratic' may be a better word than 'personal' as it includes Darwin's "The Origin of Species" which would not normally feature in such a list.
Finally, we have a description of philosophy as a discipline, asking what purposes and interests it serves.
There's a lot of good things to say about this little book. It is a well-written, lively and authoritative introduction. Craig references the Hindu tradition as well as the Western and gives plenty of encouragement and advice for further study.