Reader Player One: 10 Biggest Changes From The Book

In a literary context, a character piecing together new and vitally important information the old-fashioned way - i.e. reading - makes perfect sense.

However, as can be attested by anyone who snorted with laughter when Tom Hanks dramatically declares "I have to get to a library, fast!" in The Da Vinci Code, sometimes movies call for a solution that's, well, a bit more cinematic.

As such, it makes perfect sense that in the place of the Anorak's Almanac - a text-based anthology of James Halliday's journal entries, detailing the minutiae of his life and personal interests - we instead have a physical (well, virtual) archive within the OASIS; a museum in which video footage of Halliday's life can be played back.

Not only does this make the research sequences more involving, it's also entirely logical within the context of the story and given what we know about Halliday. Considering the immersive nature of the OASIS, it makes sense that its creator would fashion his own autobiography of sorts in the same way.

Plus, as we learn by the end of the movie (although anyone who recognises the voice of Simon Pegg might have figured it out a fair bit sooner), this archive enables the character of Halliday's old partner Ogden Morrow more active involvement - particularly because, as we'll discuss later, his role has been changed somewhat.