On the Planet Kurr, the young people rebel—to the sound of strange, unearthly music
The Still, Small Voice of Trumpets by Lloyd Biggle, Jr. (1923–2002) was first published by Doubleday Science Fiction in 1968, see Emanuel Schongut’s jacket design in a previous post.
Shown here is a paperback edition by Curtis from 1969, featuring cover art by Richard M. Powers. The uncredited typographer used Oring Title with News Gothic (or Trade Gothic) Condensed.