The links between novels and gaming are stronger than you think. Successful franchises spawn tie-in books dealing with the further adventures of Lara Croft or generic videogame action heroes, but often a respected author's words can find themselves directly or indirectly rendered in gaming.
Take Cormac McCarthy's The Road for example, a post-apocalyptic journey through a near-future American wasteland that's become required reading for some of those working on Fallout 3 at Bethesda - nuances which will surely have inspired their own desolate creation. The following books have strong links to their creative progenies and are all fascinating to read. Even though you have to be very clever to read Atlas Shrugged.