Ghost Train by Stephen Laws
Something deadly is stalking the corridors of the King's Cross train, preying on passengers. Commuter Mark Davies has been attacked and thrown from the train. Now he must team up with Ghost Train obsessed, ex-policeman Les Chadderton, before the predator disembarks for wider pastures. A variant cover of this title can be found on p. 121 of Paperbacks from Hell by Grady Hendrix.
Sphere, 1985.
ISBN: 9780722153864. 343 pp.
Paperback. Good+. Spine creased.