- The Mommy Mysteries Collection #2
- Macaroni and Freeze
- Macarons Can Be Murder
- Macchiatos and Murder (Cup of Jo 1)
- Macchiatos, Macarons, and Malice
- MacDeath
- Macho Man Murder
- Macramé Murder
- MacTavish & Scott - Das rätselhafte Medaillon
- MacTavish & Scott - Der verschwundene Gärtner
- MacTavish & Scott - Ein Cupcake für den Mörder
- MacTavish & Scott - Eine verhängnisvolle Erpressung
- MacTavish & Scott - Gefährliche Lügen
- MacTavish & Scott - Tod eines Künstlers
- Mad Money Murder
- Madame Beaumarie und die Melodie des Todes
- Madame Bertin steht früh auf
- Madame Koska & le Spectre de la Rose
- Madame le Commissaire en de dood van de politiechef
- Madame le Commissaire en de uitgestelde wraak
- Madame le Commissaire en de verdwenen Engelsman
- Maddie's Gift of Mystery
- Maddie's Recipe Of Mysteries
- Maddie's Thanksgiving Mystery
- Made-up for Murder
- Madeiragrab
- Madeiraschweigen
- Madeirasturm
- Madeleine Murder
- Madeleine Murder: A Seagrass Sweets Cozy Mystery
- Mademoiselle Rosalie und der Tote im Weinkeller
- Madness in Brewster Square
- Madonna Dilemma
- Maduro para el asesinato (Un misterio cozy en los viñedos de la Toscana—Libro 1)
- Maduro para la muerte (Un misterio cozy en los viñedos de la Toscana—Libro 2)
- Magdeburger Mords- und Spukgeschichten
- Maggie By The Book
- Maggie In Too Deep
- Maggie May and Miss Fancypants Mysteries Books 1 - 3
- Maggie May and Miss Fancypants Mysteries Books 4 - 6
- Maggie Needs An Alibi
- Maggie On The Edge
- Maggie Sullivan Mysteries Books 1-4
- Maggie Sullivan Mysteries Books 5-7
- Maggie Takes A Fall
- Maggie Without A Clue
- Magia, Caos & Assassinato
- Magic Ain't a Game
- Magic and Mocha
- Magic and Mystery
- Magic and Mystery Bundle Books 1-6
- Magic and Vengeance
- Magic Island: A Paranormal Cozy Mystery Box Set, Books 1-4
- Magic, Lies, and Deadly Pies
- Magic, Moonlight, and Murder
- Magic, Moonlight, and Murder
- Magical Mystery Paws
- Magick & Mayhem
- Magnolia Wild Vanishes (A Charmed Cat Mystery, Book 1)
- Magnolias, Moonlight, and Murder
- Magnolienmord
- Maid to Murder
- Make Believe Murder
- Make Mine Maclain
- Make Old Bones
- Make Your Own Mystery Novel
- Makeup and Murder
- Malaventura
- Malice Aforethought
- Malice in Miniature
- Malice in Morro Bay
- Malice In Wonderland
- Malice, Remorse and a Rocking Horse
- Malicious Desires a Sam Parker Mystery
- Malled to Death
- Mallorquinische Leiche zum Frühstück
- Mallorquinische Rache
- Maltese Vulture Murder
- Man Bags and Malice (A Haley Randolph Mystery)
- Man Who Wasn't All There, The
- Manche mögen's tot
- Manchmal hilft nur fauler Zauber
- Manchmal muss es eben Mord sein
- Mandy Dru Mysteries
- Manes and Murder
- Mango Cake and Murder
- Mango Cay
- Mango, Mambo, and Murder
- Manhattan Tréboul
- Mania Divina
- Maniobra de evasión - Episodio 1
- Maniobra de evasión - Episodio 4
- Mannequin Murders
- Manor of Death
- Manor of Dying
- Mansions of the Dead
- Manuscripts and Murder (Madison Kramer Mystery #1)
- Many a Twist
- Map Skills Murder
- Maple Drizzle Murder
- Maple Mayhem
- Maple Syrup and Murder
- Mapping Murder
- March Street Malice
- March Street Mayhem
- March Street Mischief
- March Street Murder
- Mardi Gras Murder
- Margaritas, Marzipan, and Murder
- Maries dunkles Geheimnis
- Marigolds and Murder
- Marigolds for Malice
- Marinating in Murder
- Mariner's Compass
- Marion Lane and the Deadly Rose
- Marion Lane and the Midnight Murder
- MARIPOSA: Mallorca-Krimi
- Marital Hex
- Mark of the Two-Edged Sword
- Marked Fur Murder
- Marlene's new Monster
- Marriage & Murder
- Marriage and Mayhem (A Lexie Starr Mystery, Book 7)
- Marriage Can Be Mischief
- Marriage Is Pure Murder
- Marriage Vow Murder
- Marriage, Merlot & Murder
- Marriage, Monsters-in-Law, and Murder
- Married to Murder
- Marry Christmas Murder
- Marry-Go-Round
- Mars Cannon Box Set
- Marshmallow Malice
- Marshmallow S'More Murder
- Martini Dirty (Un giallo di Ruby Steele – Libro 2)
- Martini Shot
- Martini: Ein Salzburger Krimi (Huber-Krimi – Band 1)
- Martinigans: Österreich Krimi
- Mary Linn, Gravestone Hunter
- Mary MacDougall Mysteries Box Set
- Mary-Alice Moves In
- Mascots Are Murder
- Masked in Paradise: A Destination Death Mystery
- Masking for Trouble
- Masquerade and Murder at the Bourbon Ball
- Masquerade Murder
- Massacre and Margins
- Mastiffs, Mystery, and Murder
- Match
- Matchmaker Mysteries Books 1 & 2
- Matchmaker Mysteries: Books 1-4
- Matchmaker Mysteries: Books 11, Prequel, Advice
- Matchmaker Mysteries: Books 5 - 7
- Matchmaker Mysteries: Books 8 - 10
- Matchmaking Advice From Your Grandma Zelda (The Collection from the Matchmaker Mysteries)
- Matchmaking Can Be Murder
- Maturato per sedurre (Un Giallo Intimo tra i Vigneti della Toscana—Libro 4)
- Mausohrnächte: Ein Kriminalroman aus Norddeutschland
- Maverick Touch Jail Break
- Maverick Touch The Adventure
- Maverick Touch The Cat
- Maverick Touch The Highway
- Maximum Security