Postcard Killers is a crime novel by Swedish writer Liza Marklund and American author James Patterson. The book was first published in Sweden in January 2010 and the English language edition was published in August the same year. At the end of August, it reached number one on the New York Times best-seller list.
Patterson contacted Marklund asking if the two would write a thriller together. Marklund visited Patterson in his home in Florida where the two discussed ideas and concepts. Patterson later sketched out a foundation synopsis and sent it to her. Marklund went through it, added things she thought were missing and sent it back to Patterson, who in turn added more comments. The creation of this novel included a lot of e-mailing back and forth. Marklund wrote the first draft and Patterson the second draft. Both authors have co-written books in the past, but never across the language barrier. Marklund says she reads English just as fast as Swedish but she wrote in Swedish and then had her drafts translated into English before they were sent to Patterson.
