I've grown awfully tired of books about serial killers in my years of reading mysteries (I'm fond of police procedurals and they seem to rely heavily on those plots, probably for good reason, but still.) But when I already enjoy a series, I'm willing to give them a try. I've enjoyed all the books about LAPD police detective Gideon and his canine partner Sirius. In the first book of the series, we learn that they have both survived a dreadful experience while trapping and arresting a serial killer. Gideon still has nightmares as well as physical scars from those events.
In L.A. Woman, Gideon and his now two canine partners, Sirius and Emily (her story was in the preceding book) have two cases to work on. One is the death of a woman from a rattlesnake bite -- she is part of a mysterious and well-funded cult, but was the death accidental or a murder? And they are also investigating the All-In Killer, who leaves clues related to poker with his seemingly random victims -- and may be coming for Gideon.
If you like dogs, you will almost certainly enjoy this series. The dogs are realistic, although perhaps smarter than average (Gideon also is an expert dog trainer, which helps). Gideon has friends and a girlfriend, but they do not intrude excessively on the story. I recommend this book and the others in the series.