Deep Secret

Told from the perspective of Rupert Venables, a Magid from planet Earth who keeps the ""Multiverse"" in balance, Diana Wynne Jones's Deep Secret (1997) follows Rupert's efforts to find his own replacement after his mentor dies and Rupert moves up to take his place. ""What might first be perceived simply as mere embellishment and rich detailing prove to be adroitly handled story elements of an intricate plot,"" wrote PW.