Vampire on the Orient Express (Avery & Carter, #1)

by Shane Carrow

It was like a morbid child’s school problem: if it takes so-and-so minutes for the conductors to realise a carriage is on fire, and the train is already travelling at blah-blah miles an hour, how many miles has it covered before two half-dead amateur monster hunters catch up to it when it’s however many degrees below zero at… whatever o’clock in the morning?