I recommend Ready Player One. 
 ...Yeah! I enjoyed OASIS! Ready Player One reminded me of Under the Never Sky (Aria's world has the Realms which is the equivalent of OASIS). 
 Okay. So I knew half the nerdy games and 80's trivia that Ernest Cline kept on babbling about throughout Ready Player One. I was an 80's baby, after all. But I am telling you.. you don't need to be acquainted with the 80's stuff to enjoy this book! It was entertaining to the max. =) 
 The middle went flat when Wade retreated to his shell after a romance flop. But overall, the adventure of Parcival in OASIS in search of the prize is addicting. I kind of want to have an avatar, too. Ha! 
 I liked Wade's relationship with Aech (I was surprised with Aech's true identity). It made me think of true friendships I found throught the net (mostly because of reading and blogging). Sometimes, you just know if a person is a friend even though you haven't seen him/her yet, right? Well, Wade and Aech are like that. They are best friends in OASIS, but in real life? They haven't even met! 
 The challenges that every avatar need to pass in order to unlock a gate was thrilling and fun! I love puzzles and solving riddles (well, only in books!) and Ready Player One is full of that (about 80's trivia and games, of course). 
 More often than not, people escaped reality by creating an alternate life online. Here in Ready Player One, Wade forgot how it is to live outside of OASIS. It made me smile that in the end, he has a reason to unplugged from the virtual world, and look forward to returning to his real life, no matter how uncertain it is.