This question already has an answer here:
I read a book series about 15 years ago when I was a young kid, and I believe there was at least 7 books in the series. I remembered them being sorta short in length (around the size of an R.L.Stine YA book) and each book was paperback with a glossy photo/image type cover so I believe the series was sort of new, Year 2000+. The first cover book had a blue hue and a kid was laying down with some sort of thick tubing going into his head. The series was in English.
Since I was pretty young when I read it, my memories of it are pretty faint now. But what I do remember is that something was going to happen to the earth so they sent people into space in a ship in hibernation pods to wait out whatever happened.
There were kids and teens, very few adults (if any) and when they woke up they were trying to figure out what happened.
In one of the books I know they somehow got back to earth and it was pretty uninhabitable (I think). What sticks out to me most is that the spaceship's mainframe or central computing system called itself mother. It could rearrange the environment and space inside the craft for super large distances (kinda like mini world).
For some reason Mother was actually bad or something (perhaps not letting them leave the ship/environment) so they plotted a way to kill her or escape. I think the kids on the space ended up splitting into groups at one point, and some of them may have developed some sort of psychic power. One scene I can remember is them running over a grassy field in the simulated world that Mother made.
I know that Alien has a spaceship called Mother, but this definitely isn't it.
I'm pretty positive the author's name was two initials and a last name. Can't remember the letters or the last name though.