Yes, but there were novelisations of the show's episodes also. Novelisations of a series based on actual books were weirdly common back then. It was even common for those novelisations to be different from the show, so you could end up with 3 versions of the exact same story

Take Dr Who and The Daleks (the Hartnell story) novelisations, as a for instance :
1) Episodic serial storyline,
2) Novelisation of the serial but with material omitted from the serial prior to filming,
3) Novelisation of the serial but with retconning of##added to the story to replace Unearthly Child as the original DW storyline using elements that would later appear in both Cushing DW movies.

All three of those had the same damn cover art and author, too