Lucifer Rising by Barbara Fifield

When ace reporter Elsa Eldridge is assigned to profile a local religious cult leader named Tyrell, she doesn’t expect to fall under his spell. But Tyrell’s charismatic personality, muscled body and piercing gaze make him hard to resist, and soon Elsa is enamored. But all isn’t what it seems. And what Elsa doesn’t know could make her regret the day she ever laid eyes on this spiritual seducer…