The Sensorites is a pretty good story; and one that I think is well suited to a book adaptation. I've not read many of these (I'm going through in TV order) but I like Nigel Robinson's novelisations - he grew up watching this era and its clear that he has a strong understanding of the characters and the tone of this era. This story isn't one with large amounts of action which benefits the novelisation; it allows Robinson to go into the thinking of the various characters and to build the appropriate tone. It doesn't dramatically change the story or add major amounts; but worth a read if you like the core idea of the TV story (especially if the pace isn't your liking).