I wouldn't bother with Ready Player One, which is an unrewarding story mostly written as an effort by the author to collect every bit of his 80s nostalgia in one place.
Instead I would suggest Speaker For The Dead, the sequel to Ender's Game and a remarkable novel.
I had a lot of fun reading the book and thought it was influential to my view of the future and VR. It's an easy read (I finished it on a long train ride) but certain parts stuck in my brain ever since. Much different and more mature than the movie.
Instead I would suggest Speaker For The Dead, the sequel to Ender's Game and a remarkable novel.