The Word Is Murder by Anthony Horowitz
Horowitz is just a little too clever for me. In The Word is Murder, he's inserted a fictional version of himself as the detective's sidekick. It's all very meta and distracting for me. The mystery itself is good, a woman is killed the same day she plans her own funeral. There are several secrets in her past that may have to do with the murder. She also has a famous actor son, which makes the case more interesting to the media.
Horowitz the character is drawn into the case by a detective who consults for the police. Hawthorne can be a bit grating. He's supposed to be the brilliant, idiosyncratic Holmes-ish character to Horowitz. The characters and mystery are actually well-done. I like the false leads and how to some extent the slightly bumbling Horowitz encourages them. The clues are all there, but the time line falls apart a little. I think I tend to want to like Horowitz's stories more...