Doctor Who and the Cave-Monsters by Malcolm Hulke, 1984 (NM)

All is not well at the Wenley Moor underground atomic research station: there are unaccountable losses of power output, nervous breakdowns amongst the staff and then - a death! UNIT is called in and the Brigadier is soon joined by Doctor Who and Liz Shaw in a tense and exciting adventure with subterranean reptile men - Silurians - and a 40ft high Tyrannosaurus Rex, the biggest, most savage animal which ever trod the earth!

6th Edition, 1984