Mystery : an Alex Delaware novel / Jonathan Kellerman.

Enhanced descriptions from Syndetics:

Few know the city of Los Angeles the way #1 bestselling author and acclaimed suspense master Jonathan Kellerman does. His thrilling novels of psychological drama and criminal detection make the capital of dreams a living, breathing character in all its glamour and infamy. That storied history of fame, seduction, scandal, and murder looms large in Mystery , as Alex Delaware finds himself drawn into a twisting, shadowy whodunit that's pure L.A. noir--and vintage Kellerman.

The closing of their favorite romantic rendezvous, the Fauborg Hotel in Beverly Hills, is a sad occasion for longtime patrons Alex Delaware and Robin Castagna. And gathering one last time with their fellow faithful habitués for cocktails in the gracious old venue makes for a bittersweet evening. But even more poignant is a striking young woman--alone and enigmatic among the revelers--waiting in vain in elegant attire and dark glasses that do nothing to conceal her melancholy. Alex can't help wondering what her story is, and whether she's connected to the silent, black-suited bodyguard lingering outside the hotel.

Two days later, Alex has even more to contemplate when police detective Milo Sturgis comes seeking his psychologist comrade's insights about a grisly homicide. To Alex's shock, the brutalized victim is the same beautiful woman whose lonely hours sipping champagne at the Fauborg may have been her last.

But with a mutilated body and no DNA match, she remains as mysterious in death as she seemed in life. And even when a tipster's sordid revelation finally cracks the case open, the dark secrets that spill out could make Alex and Milo's best efforts to close this horrific crime not just impossible but fatal.