Books in the Your World series

Desperate to return to her former life as an energy in the Core, Sketch struggles to feel part of the human world. She distracts herself with college and boys but longs for home and her best friend, Inco.In the suburban New Town of Hartington in the darkness of night, an unclothed young man appears in the living room of Clare and Steve. He doesn't know who he is or how he got there. The only word he speaks is 'Sketch'. Who is he and can he help Sketch find a way back to the Core?