Have you read the book or your kids just read it without you knowing what is it about?

This book says basically - no biggie, there is no death, you commit suicide to move to another level to be with your brother, you can't lose him, you have infinite lives in this videogame called Life. And what if I F up the next level? no biggie, you just commit suicide again to be with him, there is no such thing as permanent death/separation from your loved ones, after each death you just move to another level. That's really F up thing to teach small kids, who should know death is permanent.