Pan Macmillan UK is one of the largest general book publishers in the UK, with imprints including Macmillan, Mantle, Pan, Picador, Boxtree, Sidgwick & Jackson, Bello, Tor, Kingfisher, Macmillan Children's Books, Two Hoots, Bluebird, Campbell Books, Macmillan New Writing and Macmillan Digital Audio. Pan Macmillan is part of Macmillan Publishers International Limited.