The 23rd Midnight (Women's Murder Club Series #23) by James Patterson, Maxine Paetro

In this #1 New York Times bestseller,an attention-seeking copycat from the Women’s Murder Club’s past is recreating murders by a famous killer—with devastating new twists.

Detective Lindsay Boxer put serial killer Evan Burke in jail. 
 
Reporter Cindy Thomas wrote a book that put him on the bestseller list.
 
An obsessed maniac has turned Burke’s true-crime story into a playbook. And is embellishing it with gruesome touches all his own. 
 
Now Lindsay’s tracking an elusive suspect, and the entire Murder Club is facing destruction.