Nearly every other film nowadays is either based on a book or a comic, but there are some that have yet to be adapted - either because the topic and story is too big to handle or it's just never materialised. Here's five that definitely need to be made...

5. THE MAN IN THE HIGH CASTLE by Philip K. Dick

Having written Do Androids Dream Of Electric Sheep / Blade Runner, Minority Report and A Scanner Darkly, all of which had been turned into successful films, it's strange that this hasn't been done. Set in an alternate reality where Germany and Japan won World War II, it tells the story of five people living in Axis-occupied America and their individual lives - all of which intersect at various points. It's a fantastic book that hasn't been made into film, yet. That said, however, Ridley Scott recently bought the rights to the book and plans to make it into TV miniseries.

4. THE STAND by Stephen King

It's King's longest book - coming in at something close to 1,000 pages - but every part of is worth reading. Telling the story of humanity's apocalypse at the hands of a weaponised strained of influenza, it's a dark and gruesome affair that deals with weighty subjects. It was initially made into a piss-poor TV miniseries, starring Gary Sinisie and Molly Ringwald - but lacked any of the book's gravitas and grandeur. Most recently, David Yates of Harry Potter fame was lined up to direct it. Unfortunately, he exited the project, claiming the book was simply too big to be made effectively into a film. Warner Bros., who own the rights, are trying to get Ben Affleck to take it on.

3. WOLF HALL by Hilary Mantel

While the topic of Henry VIII may have been covered previously in TV's The Tudors and The Other Boleyn Girl, it's never been quite done like this. Wolf Hall is a complete retelling of the Tudor era and charts the rise and fall of Thomas Cromwell, one of Henry's most trusted and ruthless advisors. While it can be a little heavy with the detail and description, it could totally work as a Lincoln-esque biopic, all political intrigue and plotting. The BBC are already planning a TV miniseries and the book itself is the first in a trilogy.

2. GIRLFRIEND IN A COMA by Douglas Coupland

Arguably Douglas Coupland's best work, Girlfriend In A Coma tells the story of a group of friends whose lives are irrevocably changed when one of their own falls into a coma whilst pregnant. The writing is incredibly descriptive and the characters could be easily brought to life, not to mention there's already a built-in soundtrack for the film. We totally see somebody like Sofia Coppola or Richard Kelly directing this. Although, judging by their most recent work, they'd be more likely to mess it up.

1. BLOOD MERIDIAN by Cormac McCarthy

Anyone who's seen No Country For Old Men or The Road will tell you that Cormac McCarthy knows how to create a good story. Blood Meridian, set in the mid-1850's, tells the story of a band of scalphunters who go on a reign of terror through the borderlands of Mexico and the US. It's grim stuff, but makes for fantastic reading and could be a dark, atmospheric Western along the lines of Unforgiven or the Coen Brothers' True Grit.