The upper world

"Yesterday. Esso has a gift for being in the wrong place at the wrong time. It's just landed him in the middle of a deadly conflict between two rival South London gangs. All he wants is to make it through Friday alive. but then an accident knocks him into a place beyond space or time; a world where he can see glimpses of his past and future. And if what he sees there is true, he and his friends don't have much longer to live, unless he can change the course of history. Tomorrow. Rhia has nothing but questions about her past, and she wouldn't have expected her new phyusics tutor to have the answers. But Dr. Esso isn't here to make sure Rhia does her homework. He needs her help to unravel a tragedy that happened fifteen years ago. One that holds the key not only to Rhia's past but to a future worth fighting for"--Dust jacket.