Snatch!

Snatch! by Rennie Airth. hardcover edition. ISBN: 9780224615327.

Everything was going fine for you, Harry. You had a decent income from trading in phony passports, a lovely French mistress, and all the pleasures of Paris at your fingertips. Then Morland showed up. You should have been wary from the first moment you saw him. You should have ordered him to leave, but you didnt. You listened to his line, and that led to an apartment in Rome, a fantastic chick name Paula, a menacing ex-Nazi named Herman, a pimp named Rifai, and an elaborate plan for a royal kidnapping to net you more money than you ever dreamed of. But the dream is over, Harry, and the most horrifying nightmare of your life has only just begun...