M. Saavdrovitch Fred Saberhagen Amadeu Lopes Sabino Iuri Safronov Carl Sagan Nick Sagan Pedro de Sagunto Fernando Saldanha R. A. Salvatore Alice Sampaio Jorge Pereira de Sampaio W. Sampas George Sand Luís Pedro Santana Bruno Santos Francisco Santos Jorge dos Santos Jorge Santos Margarida Fonseca Santos Tiago Lopes dos Santos David Saperstein Andrzej Sapkowski Nuno Sapmüller Rui Pedro Saraiva José Saramago Rui Miguel Saramago Pamela Sargent Simone Saueressig Vladimir Savchenko Bruno Schulz Marcel Schwob Sir Walter Scott Augusto M. Seabra Manuel de Seabra Manuel Seabra Idris Seabright João Seixas Jorge de Sena Luis P. Senarens Luis Sepúlveda Luís Richheimer de Sequeira Maria do Carmo Castelo Branco de Sequeira João Sérgio Jérome Sériel Severina Bob Shaw Robert Sheckley Roy Sheldon Mary Shelley Stanford Sherman M. P. Shiel Lewis Shiner Wilmar Shiras John Shirley Wilma Shore António José Silva César Silva João Silva João Botelho da Silva Jorge Gomes da Silva José Maria Rodrigues da Silva Luís Filipe Silva Luísa Marques da Silva Miguel Marques da Silva Rebelo da Silva Regina Silva Sónia Silva Robert Silverberg Clifford D. Simak Dan Simmons Adriana Simon Kurt Singer Curt Siodmak Frank Sisk David J. Skal John Sladek Isabelle Smadja C. Ashton Smith E. E. "Doc" Smith Guy Snyder Bruno Martins Soares Lina Soares Adrien Sobra Jerry Sohl Gaile Somar Soni Roger Sorez Hélia Sotta Martha Soukoup Carlos de Sousa Ivo Dias de Sousa Jorge de Sousa Luís Filipe Sousa Ricardo Sousa Law Space V. Sparine Steven Spielberg Greye La Spina Norman Spinrad Michal Sprusinski Brian Stableford Olaf Stapledon Addison Starr B. R. Stateham Kurt Steiner Frances Stephens Neal Stephenson Bruce Sterling Jacques Sternberg Julie Stevens Robert Louis Stevenson Bob Stickgold John E. Stith Bram Stoker Tim Stout Peter Straub Jonathan Stroud Arkadi Strugatski Boris Strugatski Theodore Sturgeon Jack Swann Michael Swanwick Jonathan Swift Avon Swofford Fernando Sylvan Leo Szilard