Editor and co-author of A bűvös kocka ("The Magic Cube"), Műszaki Kiadó, Budapest, 1981.
Co-author of The Rubik's Cube Compendium (written by David Singmaster, Ernő Rubik, Gerzson Kéri, György Marx, Tamás Varga and Tamás Vekerdy), Oxford University Press, 1987 [REF].