A trio of gammer friends, who have never met in real life, travel together to the funeral of another internet friend.
Proving that friendships can and do form online, the trio go on an adventure to unravel a mystery. There are clues in the dead boy's room that lead them to a computer game that leads them out into the real world.
This could easily be made into a movie. It reminded me very much of Ready Player One.
Holly Black's website - http://blackholly.com/