The Light Between Worlds

Six years ago, Evelyn and Philippa Hapwell were swept from war-torn
England and into a woodland fantasy kingdom. Now back in the real
world, eldest sister Philippa is relieved, but Evelyn is grieving
for the magical place she called home. When she goes missing,
Philippa must confront the truth of what happened to them, and
the lengths her little sister was willing to go for a chance to return
to the kingdom of her heart ...