Yulian Semyonovich Semyonov (Russian: ????´? ????????? ???????, Russian pronunciation: [j?l??'an s?e'm??n?v??t? s?e'm??n?f]), pen-name of Yulian Semyonovich Lyandres (Russian: ??´?????) (October 8, 1931 – September 15, 1993), was a Soviet and Russian writer of spy fiction and detective fiction, also scriptwriter and poet.