The Bargain with Lucifer — J.E. Wiseman

When aging English professor and poet, Paul Cantor realizes he no longer attracts the admiring glances of women, his anguished despair causes him to drive off into the night with destination unknown, seeking escape from his mundane reality.

When he sees a biker's bar in the middle of nowhere called Luke's Bar and Grill, he feels compelled to stop. Though completely out of his comfort zone, he ingratiates himself with a bartender and is eventually introduced to the owner, Luke, or Lucifer, who tells him that he can solve Paul's problem. As long as he's willing to make a bargain...

Though skeptical that drinking the ancient potion will do anything, he decides to make a deal in a desperate attempt to change the hands of fate: his soul and spirit in exchange for becoming sexually appealing to those he desires. Within days, he is feeling younger and more vital and finds himself being seduced and overwhelmed by seductive women. While indulging his carnal libido, he finds himself especially drawn to Wendy, a pretty young artist with an angel's smile.

Despite his exciting new lifestyle, Paul is still haunted by the thoughts of what might really have been responsible for the sudden surge in his sexual energies and his ability to turn the head of any woman he wants. At first, he clings to his own skepticism but when Luke returns to collect on his bargain, the risk of his world being turned upside down yet again suddenly becomes very real.