May Books 9) Invasion of the Cat-People, by Gary Russell
Russell is generally one of the better writers of Who spinoff fiction (the novelisation of the TV movie, the Torchwood novel The Twilight Streets, the Tenth Doctor / Wilf novel Beautiful Chaos) but this early Missing Adventure is not a hit. Aliens who look exactly like cats plan to tear the earth in half, as you do, but are stymied by the fact that continental drift has moved crucial equipment out of alignment over a few dozen millennia (when continents would only have drifted by about a kilometre). Some nice descriptive passages, especially about Cumbria and Polly, admitted by the author to be particular interests in the foreword, but otherwise the narrative is confused and cluttered. You can skip this and I did not really need to reread it.