Sex, Murder and a Double Latte by Kyra Davis.
Sophie Katz is an author. Specifically, she writes murder mysteries.
When a film producer who was interested in one of her books supposedly commits suicide, using a method from one of his movies which was really a murder, Sophie becomes suspicious. No one, not the police, nor her friends, agree with her and she is forced to admit that it might just be a coincidence.
Then someone attacks her using a method described in one of her novels, and she becomes a little more worried. Who is trying to kill her? Is it her new boyfriend? Is it her best friend's new boyfriend? When other killings happen in scenarios straight from her books, she becomes a basket case, but finally vows that since the police think she's crazy, she'll find the murderer herself. Along with her friends, who have become convinced that she's right, they begin an investigation reminsicent of something Lucy Ricardo might plan.
It's slapstick, and a little over-the-top, but it's a light, fun read. I'm looking forward to the sequel, Passion, Betrayal and Killer Highlights (if it ever reaches the top of my tbr pile).