David Handler: Stewart Hoag Mysteries

● Main character: Stewart Hoag, formerly a celebrity author married to a famous actress. Now he solves murders while earning his living as a ghostwriter for celebrities. 
● Setting: USA (mostly California, I believe)
● Bold type indicates a book I've read

1. The Man Who Died Laughing  (1988) 
2. The Man Who Lived by Night  (1989)
3. The Woman Who Fell from Grace  (1991)
4. The Boy Who Never Grew Up (1992) 
5. The Man Who Would Be F. Scott Fitzgerald  (1993)
6. The Man Who Cancelled Himself  (1995) 
7. The Girl Who Ran Off with Daddy (1996) 
8. The Man Who Loved Women to Death  (1997) 
9. The Girl with Kaleidoscope Eyes  (2017) 
10. The Man Who Couldn't Miss  (2018) 
11. The Man in the White Linen Suit (2019) 
    
12. The Man Who Wasn't All There (2021)
13. The Lady in the Silver Cloud (2022) 
14. The Girl Who Took What She Wanted (2023) 
15. The Woman Who Lowered the Boom (2024) 
16. The Man Who Swore He'd Never Go Home Again (2025) 

There is also a long short story (or short novella), issued in 2020, between books 11 and 12 (referred to as #11.5): "The Girl Who Did Say No."