- Martinis and Murder
- Marvin Buried in the Gardens
- Maschere veneziane
- Mask
- Mask Me
- Mask Weavers for Hire
- Masked Mafia Prince
- Maskerade
- Maskierter Genuss: Ein Milliardär - Liebesroman
- Masks
- Mason (Bourne Bodyguards 2)
- Mason Michael
- Mason's Resolution
- Masque: Forge (A Gaston Leroux Phantom of the Opera Romance Series) Book two
- Masque: LeBeque (A Gaston Leroux Phantom of the Opera Romance Series) Book Three
- Masquerade Gone Awry
- Masquerade in Venice
- Masquerade Part 1
- Masquerade Part 10
- Masquerade Part 11
- Masquerade Part 12
- Masquerade Part 2
- Masquerade Part 3
- Masquerade Part 4
- Masquerade Part 5
- Masquerade Part 6
- Masquerade Part 7
- Masquerade Part 8
- Masquerade Part 9
- Masquerade: The Complete Series
- Masques De Cristal
- Massimiliano Verliebt in Rom
- Massimilla Doni
- Master Delacroix
- Master Me
- Master No
- Master of Control
- Master of Deceit: A Power Broker Novel
- Master of Disguise
- Master of Fortune
- Master of Games
- Master of Secrets
- Master of Sin
- Master of Solitude
- Master of the House
- Master of the Opera
- Master of the Opera, Act 2: Ghost Aria
- Master Stroke (Warriors of Sage 7)
- Master Thief
- Master's Fate
- Master's Tiny Dancer
- Mastered
- Mastered Under the Mistletoe
- Mastering Charlotte: The Entire 'Mastering the Virgin' Series
- Mastering His Marquise
- Mastering Secrets
- Mastering The Art Of A Three Ring Circus
- Mastering the Brides
- Mastering the Devil
- Masterpieces of Mystery Detective
- Masterpieces of Mystic-Humorous
- Masters and Mercenaries Bundle: The Early Ops (Books 1-5)
- MASTERS WISHES
- Masterson
- Masterson In Love
- Masterson Made
- Masterson Unleashed
- Masterson: The Box Set (Books 1-2)
- Masterson: The Complete Collection (Books 1-5)
- Mastiff Security: Complete Volume One
- Matalapainetta
- Match Point for Murder
- Matched Pairs
- Matched with a Hot SEAL
- Matched with Murder
- Matching Night, Band 1: Küsst du den Feind? (Gewinner des Lovelybooks-Leserpreises 2021)
- Matchless
- Matchmaker Mysteries: Books 5 - 7
- Matchmaker Mysteries: Books 8 - 10
- Matchmaking with a Mission
- Mated
- Mated in Forbidden
- Mated in Mist
- Mated Prime
- Mated to the Alien King
- Mated to the Pack
- Mated to the Wilde Bear
- Mathematical Kisses
- Mathias
- Matilda's Song
- Mating Behavior
- Mating Bite
- Mating Season
- Matrimonio fingido
- Matrimonio Italiano
- Matriochkas - Intégrale
- Matsumoto, O Guarda-Costas
- Matt Kile Combo Set Two
- Matt's Dilemma
- Matt's Nurse
- Matthias
- Matvey
- Maude's Score
- Maudite journée
- Mauprat
- Mauvaise limonade
- Maverick's Baby
- Maverick's Blood
- Maverick's Storm
- Max
- Max and Hope: A Red Team Wedding Novella
- Max Marty
- Max Starr Series: 5-Book Bundle
- MAXI
- Maxim, A Bratva Christmas
- Maximum Mayhem
- Maximum Risk
- MAXIMUM SECURITY
- Maximum Trouble
- Maximum Velocity
- Maxwell Slade Has Vanished
- May Contain Wine
- May the Best Gentleman Win - A Sexy Victorian-Era Gay M/M Mystery Novella from Steam Books