Part one is movies into books. Part two is books into movies. This list has quite a few missing items. I have a partial list of short stories which were filmed, but it's so incomplete that I haven't posted it here.
Tie-in novels from TV series are not included unless they are taken from specific television episodes. See multi-author series index for those titles which are original stories based on television series.
Last updated 4/8/07
Part One: Novelizations
Big (B.B. Hiller & Neil W. Hiller)
Bill and Ted's Bogus Journey (Robert Tine)
The Borrowers (Sherwood Smith)
The Butterfly Effect (James Swallow)
Catweazle (Richard Carpenter)
Conan the Barbarian (L. Sprague de Camp & Lin Carter)
Conan the Destroyer (Robert Jordan)
Darby O'Gill and the Little People (Lawrence Edward Watkin)
The Dark Crystal (A.C.H. Smith)
Dragonheart (Charles Edward Pogue)
Dragonslayer (Wayland Drew)
Final Fantasy (Dean Wesley Smith)
George of the Jungle (Beth Nadler)
The Ghost and Mrs. Muir (Alice Denham)
Ghostbusters (Larry Milne)
Ghost Dad (Mel Cebulash)
The Golden Child (George C. Chesbro)
The Golden Voyage of Sinbad (Steve Hart)
Goodbye Charlie (Marvin Albert)
Gremlins (George Gipe)
Gremlins II (David Bischoff)
Hawk the Slayer (Terry Marcel & Harry Robertson)
Heaven Can Wait (Leonore Fleischer)
Herbie Rides Again (Mel Cebulash)
Herbie Goes Bananas (Joe Claro)
Herbie Goes to Monte Carlo (Vic Crume)
Herbie the Matchmaker (Joe Claro)
Highlander (Garry Douglas)
Highlander (Garry Kilworth)
Hook (Terry Brooks)
Howard the Duck (Ellis Weiner)
Indiana Jones and the Last Crusade (Richard MacGregor)
It Happens Every Spring (Valentine Davies)
Jabberwocky (Ralph Hoover)
Jumanji (Todd Strasser)
Kazaam (Nicholas Edwards)
Krull (Alan Dean Foster)
Labyrinth (A.C.H. Smith)
Ladyhawke (Joan D. Vinge)
Last Action Hero (Robert Tine)
Leprechauns (Craig Shaw Gardner)
The Love Bug (Mel Cebulash)
Mandrake the Magician (Howard Ashman)
The Mask (Madeline Dorr)
The Mask (Steve Perry)
The Million Dollar Duck (Vic Crume)
The Miracle on 34th Street (Valentine Davies)
The Monkey King ( Kathryn Wesley)
Mortal Kombat (Martin Delrio)
The Phantom (Rob MacGregor)
The Private Lives of Adam and Eve (Albert Zugsmith and Robert Hill)
Quest for the Spear (Christopher Tracy)
Raiders of the Lost Ark (Campbell Black)
Return to Oz (Joan D. Vinge)
Santa Claus the Movie (Joan D. Vinge)
The Shaggy D.A. (Vic Crume)
The Shaggy Dog (Elizabeth L. Griffen)
The Spaceman and King Arthur (Heather Simon)
The Sword and the Sorcerer (Norman Winski)
The Thief of Baghdad (Achmed Abdullah)
Tomb Raider (Dave Stern)
Toy Story (Cathy East Dubowski)
Ultraviolet (Yvonne Navarro)
Unidentified Flying Oddball (Vic Crume)
Warriors of Virtue (Robert Tine)
Willow (Wayland Drew)
Willow (Joan D. Vinge)
Novels Subsequently Filmed
Alf's Button (W.A. Darlington)
Alice in Wonderland (Lewis Carroll)
Baron Munchausen (R.E. Raspe)
The Beast Master (Andre Norton - but the novel was SF)
Being There (Jerzy Kosinski)
Bid Time Return (Richard Matheson - as Somewhere in Time)
The Bishop’s Wife (Robert Nathan, remade as Meet Joe Black.)
Blackbeard's Ghost (Ben Stahl)
The Borrowers (Mary Norton)
The Box of Delights (John Masefield)
The Brass Bottle (F. Anstey)
Chitty Chitty Bang Bang (Ian Fleming)
A Christmas Carol (Charles Dickens)
The Circus of Dr. Lao (Charles G. Finney)
A Connecticut Yankee in King Arthur's Court (Mark Twain)
Eragon (Christopher Paolini)
The Fellowship of the Ring (J.R.R. Tolkien)
Freaky Friday (Mary Rodgers)
The Ghost and Mrs. Muir (Josephine Leslie)
The Girl, The Gold Watch, and Everything (John D. MacDonald)
The Gnomobile (Upton Sinclair)
The Golden Evenings of Summer (Will Stanton – as Charley and the Angel)
Green Mansions (W.H. Hudson)
Gulliver's Travels (Jonathan Swift)
Harry Potter and the Chamber of Secrets (J.K. Rowling)
Harry Potter and the Goblet of Fire (J.K. Rowling)
Harry Potter and the Prisoner of Azkaban (J.K. Rowling)
Harry Potter and the Sorcerer's Stone (J.K. Rowling)
The Hoboken Chicken Emergency (Daniel Pinkwater)
The House of the Spirits (Isabel Allende)
James and the Giant Peach (Roald Dahl)
The Land of Oz (L. Frank Baum)
The Last Unicorn (Peter Beagle)
The Last Wave (Petru Popescu)
The Lion, the Witch, and the Wardrobe (C.S. Lewis)
Lost Horizon (James Hilton)
Mary Poppins (P.L. Travers)
The Million Dollar Duck (Vic Crume)
The Mists of Avalon (Marion Zimmer Bradley)
Mr. Limpet (Theodore Pratt - as The Incredible Mr. Limpet)
The Neverending Story (Michael Ende)
The Odyssey (Homer)
Oh, God! (Avery Corman)
On Borrowed Time (Leonard Watkin)
The Original Mr. Ed (Stories - Walter Brooks)
Orlando (Virginia Woolf)
Peabody’s Mermaid (Guy & Constance Jones - as Mr. Peabody and the Mermaid)
Peter Pan (J.M. Barrie)
Pinocchio (C. Collodi)
Practical Magic (Alice Hoffman)
The Princess and the Goblin (George MacDonald)
The Princess Bride (William Goldman)
The Rescuers (Margery Sharp)
The Rescuers Down Under (Margery Sharp)
The Secret of the Ruby Ring (Yvonne MacGrory - as The Ruby Ring)
Shoeless Joe (W.P. Kinsella - as Field of Dreams)
The Third Witch (Rebecca Reisert)???
Something Wicked This Way Comes (Ray Bradbury)
Through the Looking Glass (Lewis Carroll)
Tinted Venus (F. Anstey as Goddess of Love)
Tuck Everlasting (Natalie Babbitt)
The Two Towers (J.R.R. Tolkien)
Vice Versa (F. Anstey)
Watership Downs (Richard Adams)
What Dreams May Come
Who Censored Roger Rabbit? (Gary Wolf – as Who Framed Roger Rabbit?)
Will Success Spoil Rock Hunter? (Play - George Axelrod)
Willy Wonka and the Chocolate Factory (Roald Dahl)
The Wind in the Willows (Kenneth Grahame)
The Winged Colt of Casa Mia (Betsy Byars)
The Wizard of Oz (L. Frank Baum)
The Year the Yankees Lost the Pennant (Douglas Wallop – as Damn Yankees)