A review by nwhyte
Doctor Who and the Cybermen by Gerry Davis

3.0

http://nwhyte.livejournal.com/1028417.html#cutid3

A relatively early novelisation here, but not an especially good one. Davis' characterisation is poor (Jamie is thick; Polly is a girlie; the head of the Moonbase is from Yorkshire) and the science of the story still makes no sense. Davis' style must have improved over the years - this and Doctor Who and the Tenth Planet are markedly inferior to Doctor Who - The Highlanders.

https://nwhyte.livejournal.com/3438699.html

I twitched at a couple of differences. One of them is in the conversation about Lister:

‘Just a minute.’ Polly was beside him, her face looking a little anxious. ‘Are you really a medical doctor?’
The Doctor stopped, thought for a moment, and then brought out his inevitable diary. ‘Yes. I think I did take a medical degree once.’ He opened an early page in the diary and looked. ‘There it is; Edinburgh, 1870! What’s this...’ He looked closely at the entry. ‘... Lister... Mmm...’ He closed the diary, thrust it back into his pocket and turned to the patient.

Lister left Glasgow for Edinburgh in 1869, and remained there for the rest of his career. Between the 1967 broadcast and the 1975 novelisation, someone must have pointed out to Gerry Davis that it would have been impossible for the Doctor to study under Lister in Glasgow in 1888.

Another difference is in the account of the origin of the Cybermen, a desperate attempt to restore continuity with The Tenth Planet (though it's puzzling that Davis thought readers of 1975 would care more about this than viewers in 1967):

Benoit sat down on the edge of the console, his cool self again. ‘But the history books say you were all killed when your planet, MONDAS, exploded in 1986.’
The first Cyberman had moved to a position where he could watch the activity in the Gravitron room. He now turned round to answer Benoit. ‘We were the first space travellers from MONDAS. We left before it was destroyed. We have come from the other Cyberman planet, TELOS.’
The Doctor broke in, ‘Then you know how MONDAS was destroyed?’
The first Cyberman looked at him. ‘Yes, and we know what part you played in that. We have returned to take the power you used to destroy MONDAS.’

This represents one line of the TV script where Benoit says "But you were all killed!"