Like This, Try This - Bout of Books Challange

If you liked  Then you should read   

If you enjoyed the anime Sword Art Online and you don't mind a slow read I would recommend Ready Player One written by Ernest Cline. They are similar in the game/s they are set in. In both the anime and the book there is a MMOG that takes you into the game with a visor and advanced technology rather than you playing with a mouse and keyboard, like we do now. There is also the idea of someone who would normaly work alone starts working with other people in both anime and book.