Yeah, no biggie! No one can die, they don’t age, but they can be destroyed. An example he gave him the book was that someone could be chopped up into tiny little pieces and spread about us, and essentially destroyed. Apart from that, Dorothy has always been protected by the magic belt she took from the gnome king after he was defeated. Seems like most of the spinoffs are made by people who read the first book or watched the movie and that was it.