Obsession is book four in the Explicitly Yours Series.
Beau Olivier never intended to fall in love, but what was once his conquest has become his prize. Until he ends up in the same position he was ten years earlier—between Lola's legs and begging to have her. So when she disappears into thin air, leaving him empty-handed and alone, Beau is consumed with the need to find her.
As Lola gets farther from his reach, Beau is driven to the brink of insanity trying to find her. When he reaches the edge, he has to decide if he can let Lola go for good—or if he'll bring her down with him.