By John Henry It’s much too simplistic — not to mention sarcastic — to say that Mayhem will be in bookstores just in time for a good Valentine’s Day read.You know, your standard love story about a woman who marries the man of her dreams, only to find out he is the host to the most vile demon, which attached itself through a drink of water taken out of a river in the countryside in Poland.No thanks, you say?Indeed it’s no love story, but if you enjoy a true crime-novel combo, don’t pass on the newest work from British-born author Sarah Pinborough, who takes a cue from Dean Koontz in composing a new supernatural-whodunit-polyphonic thriller for those not of the faint of heart.