The Blackmail Express — Jake Logan

SLOCUM HAD BEEN SWINDLED. And when he blew Joe Gill's safe open, it was only to take back the money he had lost gambling -- was forced to lose, that is, at gunpoint. But there was no money. Only a bunch of letters. Letters written by Molly Hunter, the governor's wife. Letters that said she had worked for Joe as a hooker, that she had paid him blackmail money for years. Now Joe and his henchmen are after Slocum. And so are the governor and his troops -- because Molly is on the run with him...