- Found: Saved by Love #2
- Founder
- Founders
- Founders' Day Fiasco
- Fountain
- Fountain & Fairfax
- Fountain Case
- Fountain Inn
- Fountain of Angels
- Four AM
- Four Aunties and a Wedding
- Four Buttons Pushed
- Four by Five (R&P Labs Mysteries Short Stories)
- Four Corners, Volume 1 (The Argosy Library)
- Four Cuts Too Many
- Four D
- Four Days In February
- Four Days in June
- Four Days of PHAME: A Matt Mollster Mystery
- Four Decades of Lies, Deceit, Corruption and Murder
- Four Dog's Sake
- Four Faultless Felons
- Four Fingers Four Minute Mysteries
- Four for the Money
- Four Funerals and Maybe a Wedding
- Four Hands
- Four Hearts
- Four Hours: A Dark and Thrilling Killer Short Story
- Four Just Men
- Four Keys and a Cabin
- Four Letters
- Four Max Carrados Detective Stories (A Collection of Classic Detective Stories)
- Four Murders in a Small Town
- Four Notes
- Four of Spades
- Four on the Floor: A Jeff Talbot Mystery
- Four on the Floor: A John Tyler Thriller
- Four Paths Crossed
- Four Pieces for Power
- Four Pieces of Reyn
- Four Post Bed Death
- Four Queens
- Four Rabbi Small Mysteries
- Four Reasons to Die
- Four Red Diamonds (A Lady Marmalade Mystery 4 Pack)
- Four Relentless Days
- Four Scarpetta Novels
- Four Shots Neat
- Four Shrimp Tacos and a Walther P38
- Four Steps
- Four Stones
- Four Sue Grafton Novels
- Four Summoner's Tales
- Four Thrillers
- Four to the Rescue
- Four Vases (Daughters)
- Four Warned
- Four Ways to Midnight
- Four White Roses
- Four Words
- Four-and-Twenty Blackbirds
- Four-Part Dissonance
- Four-Square Jane
- Four-Square Jane (British Mystery Classic)
- Four-Square Jane (Classic Mystery Thriller)
- Fourchette mortelle à Chinon
- Fourteen New Ghost Stories
- Fourteen notes
- Fourth Debt
- Fourth Degree Burn
- Fourth Down
- Fourth Grave Beneath My Feet
- Fourth of July Creek
- Fourth Reich Death Squad
- Fout Geld
- Fowl Play
- Fowl Prey
- Fowl Weather
- Fowler's Folly
- Fox - Unter Feinden
- Fox Creek
- Fox Goes Hunting
- Fox in plain Sight
- Fox Island
- Fox River
- Fox Tracks
- Fox Trap: A SciFi Urban Fantasy
- Fox's Fury
- Foxcatcher
- Foxe Hunt
- Foxe Tail
- Foxed Up
- Foxlowe
- Fra amore e morte
- Fra billede til billede
- Fra blokken
- Fra Dybet
- Fra Helvete og ned
- Fra noi e la morte