Dr. David Rothberg Thriller Series

Dangerous Behavior (Dr. David Rothberg Series Book 1) FREE by Walter Marks: After fifteen years in solitary confinement, Victor Thomas Janko, known as the infamous Baby Carriage Killer, has become eligible for parole. As the unseasoned prison psychiatrist Dr. David Rothberg strives to determine whether Janko “if released would behave in a manner dangerous to others, he's drawn into the dangerous world of the killer's mind.

This book is Free on February 22, 2026