Wonderful use of Magnetic Ink in an abbreviated gradient on the front cover. It took a while to track down this font as there are several very similar variations. My first thought was Amelia, but the small squares that appear beneath the N and M led me to Computer. Magnetic Ink is Photo-Lettering’s adaptation of this typeface originally designed by James H. Moore for VGC. One of the details that distinguishes the Photo-Lettering version is the flipped V. Below this are some variations of a 3D Ginger Snap. These uses are repeated on the back, but the inner sleeve contains a nice yellow shaded detail to the Discovery font.
The author line is set in Futura and the credits on the back cover are in Monticello. This compilation of essays by science fiction writers was edited by Tom Purdom and published by Doubleday in 1969. Jacket design by Rose Sommerschield.