Billy Chen and the Astral Plane

The Astral Plane, also called the Astral World, thought to be the planes of angelic existence, intermediate between earth and heaven. Populated by angels, spirits or other immaterial beings ....... and certain Germans, acting to supply intelligence to Adolph Hitler.
Billy Chen's grandfather, Kwong Chen, the master of all Chen magic, provides Billy with the powers to travel across the Astral Plane; enabling him to fight against those wishing to alter the course of written history. The result of the Second World War must not change.