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Carl Sagan, who died in 1996, was a tireless and inspiring populariser of
science as well as a leading planetary scientist. In 1994, on his 60th birthday,
a group of friends and admirers organised a symposium in his honour, published
as Carl Sagan’s Universe. The essays range across Sagan’s enthusiasms, from
space exploration to the search for extraterrestrial life, from science
education to pseudoscience and science policy—all as admirably clear and
approachable as Sagan always was. Published by Cambridge University Press,
£14.95/$22.95, ISBN 0521576032.