The Frugal Wizard's Handbook for Surviving Medieval England

A man awakes in a clearing in what appears to be medieval England with no memory of who he is; where he came from; or why he is there. Chased by a group from his own time; his sole hope for survival lies in regaining his missing memories; making allies among the locals; and perhaps even trusting in their superstitious boasts. His only help from the "real world" should have been a guidebook entitled The Frugal Wizard's Handbook for Surviving Medieval England; except his copy exploded during transit. The few fragments he managed to save provide clues to his situation; but can he figure them out in time to survive?