In 1987, Robert Maxwell responded to the publication of two unauthorised biographies of himself with numerous lawsuits, threats of legal action against individual booksellers, and the rapid publication of an authorised biography by Joe Haines, political Editor of the Mirror Group which Maxwell owned. Of the two unauthorised books, Maxwell: A Portrait of Power by Peter Thompson and Anthony Delano was withdrawn from sale and all unsold copies pulped after Maxwell successfully sued the publishers and authors for libel. The second book, Maxwell: The Outsider by Bower sold out in hardback but Maxwell prevented the paperback edition appearing, in part by buying the publishing company which held the paperback rights. Maxwell also filed a libel action against Bower and the hardback publishers, Aurum Press. Maxwell allowed this action to lapse in 1990 but only after Bower and Aurum had submitted a detailed defence of the book.