sentences:  PIE produced regular magazines that were distributed to members.The original "Newsletter" was superseded in 1976 by "Understanding Paedophilia", which was intended to be sold in radical bookshops and be distributed free to PIE members.It was mainly the concern of Warren Middleton, who attempted to make the magazine a serious journal that included extracts from sensitive paedophilic literature and articles from psychologists, with the aim of establishing respectability for paedophilia.