Undetectable
M. C. Soutter
The Phoenix Endangered (The Enduring Flame)
Mercedes Lackey
The Blood Eagle in the Big Easy
K. A. Lange
Second's Chance
Robin Scott
Mouse and Dragon
Sharon Lee & Steve Miller
Liaden Universe (13)
The Mourning Woods
Rick Gualtieri
The Tome of Bill (3)
The Mountains of Mourning
Lois McMaster Bujold
Miles Vorkosigan (6.5)
The Mountain's Call
Caitlin Brennan
White Magic (1)
Mountain Witch
Rachel Ford
Knight Protector (2)
Mountain of Daggers
Seth Skorkowsky
Tales of the Black Raven (1)
Mountain Magic
David Drake & Eric Flint & Ryk E. Spoor
The Mountain God Sleeps On Its Back
Sam Farren
Motor Mouth
Janet Evanovich
Mother of Winter
Barbara Hambly & Donato Giancola
Darwath (4)
Mother of Souls
Heather Rose Jones
Mother of Demons
Eric Flint
Mother Load
KG MacGregor
Shaken (4)
The Mother Hunt (Rex Stout Library)
Rex Stout
Nero Wolfe (52)
Moth: The Moth Saga, Book 1
Daniel Arenson
Moth Saga (1)
The Mote in God's Eye
Larry Niven & Jerry Pournelle
Mostly Harmless
Douglas Adams
The Hitchhiker's Guide to the Galaxy (5)
The Moscow Option
David Downing
The Mortician’s Daughter
Nan Higgins
Morticai's Luck
Darlene Bolesny
The Mortal Word
Genevieve Cogman
Invisible Library (5)
The Mortal Bone
Marjorie M. Liu
Hunter Kiss (4)
Mort
Terry Pratchett
Discworld (4)
The Morrigna
Rachel Rawlings
Morrigan's Cross/Dance of the Gods/Valley of Silence
Nora Roberts
The Circle Trilogy (1)
Morningstar
David Gemmell
Morgue Drawer Four
Jutta Profijt & Erik J. Macki
Morgue Drawer (1)
Morgawr
Terry Brooks
The Voyage of the Jerle Shannara (3)
Moreta: Dragonlady of Pern (Pern (Chronological Order))
Anne McCaffrey
More Work for the Undertaker
Margery Allingham
Campion (13)
More Than an Echo
Linda Kay Silva
Echo Branson (1)
More Deaths Than One
Nero Wolfe (43)
Mordant's Need
Stephen R. Donaldson
Morbida's Game
K. Simpson
Morality for Beautiful Girls
Alexander Mccall Smith
The No. 1 Ladies' Detective Agency (3)
Moontangled
Stephanie Burgis
The Harwood Spellbook (2.5)
Moonshine
Rob Thurman
Cal and Niko Leandros (2)
Moonlight Love and Witchcraft
Vaela Denarr & Micah Iannandrea
Moonlight & Mechanicals
Cindy Spencer Pape
Gaslight Chronicles (4)
Moonglow
Charlie Romo
Moonbreaker
Simon R. Green
Secret Histories (11)
Moon's Artifice
Tom Lloyd
The Moon Tunnel
Jim Kelly
Philip Dryden (3)
Moon Sun and Stars
Kim Phoenix
Moon Over Soho
Ben Aaronovitch
Rivers of London (2)
Moon of the Terrible
SM Reine
The Cain Chronicles (3)
The Moon Is a Harsh Mistress
Robert A. Heinlein
Moon Fever
Ileandra Young
The S.P.E.A.R. Mission Files (2)
Moon Dance
J. R. Rain
Vampire for Hire (1)
Moon Child
Vampire for Hire (4)
Moon Called
Patricia Briggs
Mercy Thompson (1)
Moon and Flame
Kay Solo
Ghost Walk (1.5)
Montezuma Strip
Alan Dean Foster
Angel Cardenas (1)
Montana Sky
Monstrous Regiment
Discworld (31)
Monsters of the Earth
David Drake
The Books of the Elements (3)
Monsters and Magicians
Robert Adams
Monsters : I Bring the Fire Part II
C. Gockel
I Bring the Fire (2)
The Monster of Florence
Douglas Preston