These are books involving fantastical concepts such as the practice of magic, creatures not in known existence and lands dissimilar to Earth as we know it. 

10 / 10 (Fantastic!)
The Dresden Files series by Jim Butcher
Fool Moon by Jim Butcher
Storm Front by Jim Butcher
Darkest Powers Trilogy by Kelley Armstrong

9 / 10 (Really Great!)
John Dies at the End by David Wong
The Star Wars Trilogy
American Gods by Neil Gaiman
The Strongbow Saga by Judson Roberts
World War Z: An Oral History of the Zombie War by Max Brooks
The Hogfather by Terry Pratchett
Artemis Fowl and the Atlantis Complex by Eoin Colfer
The Wise Man's Fear by Patrick Rothfuss

8 / 10 (Great!)
Scarlet by A. C. Gaughen
The Gathering by Kelley Armstrong
The Shifter by Janice Hardy
The Night Watch by Terry Pratchett
Wicked Lovely by Melissa Marr
Men at Arms by Terry Pratchett
The Name of the Wind by Patrick Rothfuss
The Secret Fiend by Shane Peacock
The Last Apprentice Series by Joseph Delaney
Heir Apparent by Vivian Vande Velde
The Hitchhiker's Guide to the Galaxy by Douglas Adams
The Last Olympian by Rick Riordan
Pendragon Series by D. J. MacHale
The Circle of Magic by Tamora Pierce
Wondrous Strange by Lesley Livingston

7 / 10 (Good)
Mr. Shivers by Robert Jackson Bennett
After Hamelin by Bill Richardson
Finnikin of the Rock by Melina Marchetta
Dust City by Robert Paul Weston
Small Gods by Terry Pratchett
Clockwork Angel by Cassandra Clare
Jingo by Terry Pratchett
Feet of Clay by Terry Pratchett
Soul Enchilada by David Macinnis Gill
Suck It Up by Brian Meehl
The Siege of Macindaw by John Flanagan
Rise of the Evening Star by Brandon Mull
Artemis Fowl: The Time Paradox by Eoin Colfer
House of Many Ways by Diana Wynne Jones
Emperor Mage by Tamora Pierce
Bloodhound by Tamora Pierce
Terrier by Tamora Pierce
Wild Magic by Tamora Pierce
The Wings of a Falcon by Cynthia Voigt
The King of Attolia by Megan Whalen Turner
The Thief by Megan Whalen Turner
Ranger's Apprentice Series by John Flanagan
The Queen of Attolia by Megan Whalen Turner
The Nation by Terry Pratchett
The Lost Queen by Frewin Jones
Goose Chase by Patrice Kindl
Life, the Universe, and Everything by Douglas Adams
The Restaurant at the End of the Universe by Douglas Adams
Maximum Ride Trilogy by James Patterson
Lamplighter by D. M. Cornish
Foundling by D. M. Cornish
Princess Ben by Catherine Gilbert Murdock
City of Dogs by Livi Michael
Erec Rex: The Search for Truth by Kaza Kingsley
The Mark of Solomon Series by Elizabeth E. Wein
Mariah Mundi: The Midas Box by G. P. Taylor
The Battle of the Labyrinth by Rick Riordan
The Faerie Path by Frewin Jones
Fablehaven by Brandon Mull
The Titan's Curse by Rick Riordan
Mothstorm by Philip Reeve
The Will of the Empress by Tamora Pierce
The Circle Opens by Tamora Pierce
Pendragon: The Lost City of Faar by D. J. MacHale
Pendragon: The Merchant of Death by D. J. MacHale
Larklight by Philip Reeve
Dead Connection by Charlie Price
Questors by Joan Lennon

6 / 10 (Fair)
Every Other Day by Jennifer Lynn Barnes
The Obsidian Blade by Pete Hautman
A Game of Thrones by George R. R. Martin
Inheritance Cycle by Christopher Paolini
Sky Realm by Rebecca Moesta and Kevin J. Anderson
The Hunger Games Series by Susanne Collins
Dance of the Assassins by Herve Jubert
The Lighthouse Land by Adrian McKinty
Eon: Dragoneye Reborn by Alison Goodman
Beauty by Robin McKinley
Darklight by Lesley Livingston
Wolf Speaker by Tamora Pierce
Darkwing by Kenneth Oppel
The Ragwitch by Garth Nix
Blue Fingers: A Ninja's Tale by Cheryl Aylward Whitesel
The Storm Thief by Chris Wooding
Gideon the Cutpurse by Linda Buckley-Archer
Pearls of Lutra by Brian Jacques
Hatching Magic by Ann Downer
The Power That Preserves by Stephen R. Donaldson
The Illearth War by Stephen R. Donaldson
Lord Foul's Bane by Stephen R. Donaldson
Leven Thumps and the Gateway to Foo by Obert Skye
Mostly Harmless by Douglas Adams
Maximum Ride by James Patterson
So Long, and Thanks for all the Fish by Douglas Adams
Fall of a Kingdom by Hilari Bell
Foxes of Firstdark by Garry Kilworth
City of Masks by Mary Hoffman
Emmy and the Incredible Shrinking Rat by Lynne Jonell
Ariel by Grace Tiffany
Ocean Realm by Rebecca Moesta and Kevin J. Anderson
The Frost Child by Eoin McNamee
The Night Children by Kit Reed
Dark Power Collection by Bill Myers
Keeper of the Grail by Michael P. Spradlin
Crystal Doors by Rebecca Moesta and Kevin J. Anderson
Storyteller by Edward Myers
Daughter of the Flames by Zoe Marriot
Wings by Jason Lethcoe
Clovermead by David Randall
The Sight by David Clement-Davies
Chosen by Ted Dekker
The Dead and the Gone by Susan Beth Pfeffer
Pendragon: The Never War by D. J. MacHale
Starcross by Philip Reeve
Shadowed Summer by Saundra Mitchell

5 / 10 (Not Very Good)
Insomnia by Stephen King
The Twilight Series by Stephanie Meyer
Andromeda Klein by Frank Portman
Vanishing Girl by Shane Peacock
The Dangerous Days of Daniel X by James Patterson and Michael Ledwidge
Middleworld by J & P Voelkel
The Tiger's Apprentice by Laurance Yep
Huntress by Malinda Lo