Ghostscape - Joe Layburn

When a young Somali girl named Aisha comes across pale, skinny Richard in a stall in the school bathroom, shes as surprised to meet a boy from the 1940s as he is to see a black girl wearing a headscarf. The stalls door opened onto a time warp, transporting Aisha back 60 years to the Blitz, when her school was a sanctuary for Londoners fleeing the bombing. But Richard soon becomes more than just a friendly ghost
he becomes a real friend, helping Aisha confront her difficulties at home, where shes torn between two cultures, and at school, where a bullying classmate makes her life miserable. Curious to know more about Richards world, she researches the history of her neighborhood during the Blitz. When she discovers what is about to happen, she knows she must warn Richard . . . but how? Inspired by the 1940 bombing of the South Hallsville Primary School, Ghostscape weaves a realistic story about bullying and self-identity into an intriguing and absorbing time-travel adventure.