Speculations 
Subtitle: 17 Stories Written Especially for This Volume By Well-Known Science Fiction Authors, But Their Names are Concealed By a Code and It's Up to You to Figure Out Who Wrote What
Contributors: Isaac Asimov (Editor); Alice Laurance (Editor)
Publisher: Houghton Mifflin Company
Published: April 1982
Language: eng
Number of pages: 288
ISBN-13: 9780395320655