What is this title of this fantasy or sci-fi book that I read in middle school?

Reckless" by Cornelia Funke: For years, Jacob Reckless has been secretly disappearing to another world, a world behind a mirror, a world for which his father abandoned his family. The mirror world is Jacob's escape from reality. It's a place for treasure hunts and magnificent quests.

A world where witches haunt the forests and giants and dwarfs roam. A world locked in a deadly war. Jacob's secret seems safe, until one day his younger brother Will follows him, with disastrous consequence.

Faced with a curse that is quickly turning Will to stone, the Reckless brothers are thrust into a race against time to find a cure before Will is lost forever.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.