The Beast Within
Zola Emile
Penguin
Roubaud is consumed by a jealous rage when he discovers a sordid secret about his young wife's past. The only way he can rest is by forcing her to help him murder the man involved, but there is a witness - Jacques Lantier, a fellow railway employee.
Jacques, meanwhile, must contend with his own terrible impulses, for every time he sees a woman he feels the overwhelming desire to kill. In the company of Roubaud's wife, Severine, he finds peace briefly, yet his feelings for her soon bring disasterous consequences.