The New Improved Sun: An Anthology of Utopian S-F is an anthology of science fiction stories edited by American writer Thomas M. Disch, published in hardcover by Harper & Row in 1975.

Second edition published by Hutchinson in 1976.

Each of the vignettes in Sladek's "Fifteen Utopias" carries an individual subtitle.

"Cassandra Nye" is a pseudonym of Charles Naylor.

[1] In The New York Times, Gerald Jonas notes that while the anthology's contents contradicted its subtitle, being mostly satires and dystopias, "Disch knows exactly what he is doing: he points out in a brief introduction that prescriptive Utopias tend to be not only dull but also silly and repugnant.