In the realm of novels, Ian is represented by his literary agent:

John Berlyne
Zeno Agency Ltd.
Primrose Hill Business Centre
110 Gloucester Avenue, London, NW1 8HX
+44 207 096 0927

In the realm of television, film, and moving-daguerreotype, Ian is represented by his manager:

Michael Prevett
Circle of Confusion
8931 Ellis Ave
Los Angeles, CA 90034
(310) 691-7000