Ernest Cline - Ready Player One

The year is 2044 and the world is an unpleasant and grim place. Famine and poverty are rampant, and to escape the bleakness of real life most people choose to instead enter the world of OASIS.
OASIS - is a virtual world that is very elaborate and realistic,and it contains multiple planets and landscapes. It was created in main part by a man named James Halliday, the ultimate lonely computer geek, who was obsessed with the 1980's. Halliday died some time before the start of this story but had stated in his will that his vast fortune would go to the person who could find three magical keys hidden in OASIS, pass the portals associated with them, and then find the ultimate prize - the hidden egg. Over the years many people have searched for these magic keys and gates but none have prevailed. Those who search call themselves gunters. Also at play is a villainess corporation called IOI led by a man named Sorrento - who's agents searching for the egg are called 'Sixers'.
The main protagonist of this story is an 18 year old named Wade Watts. Wade lives in abject poverty with his uncaring and cruel aunt. Because Wade's life is so grim, like so many others he spends almost all of his time in OASIS. It's where he goes to school and it's in OASIS where he meets his friends - avatars named Aech and Art3mis. Because everyone he meets via OASIS is an avatar, it's hard for anyone to distinguish friend from foe.
Because of his real world lack of money and help, Wade has few powers and weapons for his avatar (which he named Parzival, a takeoff of Percival the Knight which was already taken.) Even with this disadvantage, because of his intelligence and his obsession with anything Halliday or 80's related he is able to figure out how to find the first key - the copper one, and figures out how to pass that first gate. The race is on, with other gunters and the Sixers in hot pursuit. The future of OASIS is at risk because Sorrento intends to start charging money for the use of OASIS, which would keep so many offline and unable to access it. And this competition poses real life dangers for the players as well.