Strange for me with a Ray Bradbury novel in that I found this a slow burn, it took a bit of reading to get into it.
Thankfully for me I persevered with it, its Ray Bradbury after all, he's my favourite author for a good reason, a phenomenal imagination. Drawing me into the milieu inhabited by the characters and gripped by the page turner storyline to the very end. I can't abide 'Reviews" that give a blow by blow account such that there's no point in reading the book. So I won't bother with that, instead I suggest reading it, experience every nuance for yourself.
This is a detective story murder mystery set in Hollywood.