21 of the biggest changes 'Ready Player One' makes from the book

Warner Bros. Warning: There are spoilers ahead for "Ready Player One." "Ready Player One" is currently in theaters andit's a lot different from the book you may remember. Steven Spielberg's adaptation takes many liberties from the 2011 best-selling novel.While all of those changes aren't great, most of them improve vastly upon the novel. There are way too many differences from the movie to count up. But for the film's release, INSIDER gathered together some of the biggest changes the movie makes...