The world keepers. Roblox suspense for older kids / book 2
(Book)

When Jed gets a mysterious message in the game, will he go back in to help a friend? Jed is back home, busted ankle and all, but he has questions about everything that's happened. Kat has answers, but she won't give them up unless he agrees to help her out by coming back into a very different game. Not everyone wants Jed to come back though, especially Dirk. He will do everything in his power to keep Jed out of the game, and if he can't keep him out, he'll do everything in his power to make sure Jed stays trapped in the digital world forever. There is so much more at stake than Jed realizes, and the answers Kat gives him will set him on a path he never expected, as long as he's brave enough to see it through. Let's hope he's brave enough because if he's not, our world will never be the same.