I'm not entirely certain that this is the author or really distateful book I remember. The author's Celtic surname and a protagonist who takes a big trip overseas every time life goes tits-up seem right. What I remember most about the Travis McGee's character in Mexico was the cold, grim depiction of murders and mentally incapacitated loose women. It had enough compartmentalized moralizing to be Scots-Irish sermon typing, but was the moralizing more about the author's WW II background?