Shopkeeper and collector of magical items, he owns a shop and can be noted for his loyal (beyond most loyalites) servant, Simpkin. He's quite a powerful magician, but was injured when Bartimaeus fought him in his shop. When Bartimaeus was consequently held captive in the Tower of London, Pinn visited him briefly, accompanied by Jessica Whitwell. He was also friendly with Simon Lovelace before the coup d'état, knowing him on a first name basis.