Marlo Quint writes murder mystery puzzle books you actually solve, not stories that hand you the answer in the last chapter.
Every Marlo Quint book is a whodunit built as a logic puzzle. You read the case, follow the suspects, and cross names off one by one until a single person is left standing. Each clue is written to remove part of the list, so the killer is reached by deduction rather than a lucky guess.
The solution isn't printed anywhere in the pages. When you think you have your killer, you name them in the Verdict Room here on the site, which checks your answer right in your browser. Nothing you type ever leaves the page, and the ending stays unspoiled for the next reader.
The Train Killer is the first case: a murder aboard a train where passengers get on and off at every station, and the field of suspects shifts with each stop. More cases follow, each one self-contained, each with a single provable answer.
If you like cozy mysteries, classic detective fiction, or a good logic puzzle, these books were made for you. Read the case, trust no name, and find the killer.
Read The Train Killer, cross out the suspects one station at a time, then name your killer in the Verdict Room.
See the cases