The First Doctor, his first encounter with the Daleks - and the first ever Doctor Who novel back in print!
Mr Whitaker starts the novel with a variant version of the first episode of the series, although Ian is not a teacher and Susan has a different surname (English instead of Foreman). This version is rather more atmospheric than the equivalent in the novelisation of An Unearthly Child. In fact, writing the book in the first person (narrated by Ian) is an excellent device in this book.
Moving on into the story proper, it is again not a simple adaptation of the televised story. While fairly faithful, some of the deviations (like the glass Dalek) add interest in a way that the show could not actually portray at the time. The Thal characters are fairly well outlined (given that they are quite flat in the original serial), and the descriptions of the planetary environs is also good.
Way back when, Doctor Who books included line drawing illustrations. I've never been impressed with these, but those in this book are among the best, and obviously based on stills from the original.
An excellent, if inaccurate, adaptation of an important story. A pity they aren't all this good.