Cover art and interior illustrations by Clifford Geary. The reversed all-caps typography on the dust jacket pairs Warren Chappell’s Lydian (1938) with Futura. The cover exclusively uses the iconic sans serif designed by Paul Renner and first cast by the Bauer foundry in the late 1920. Technically, it might also be Intertype’s recutting under the original name (1939), or Spartan (1939), which was cut cooperatively by ATF and Linotype, and “is almost indistinguishable from Futura”, according to Mac McGrew.
On the title page, Futura is complemented by another early geometric sans serif: The light style used for “AColonial Boy From Mars” and the illustrator credit is from Vogue. This Futura follower was released by Intertype in 1930. Here it’s easily distinguishable by the long bar in G and the M with vertical stems. Intertype offered alternates that stay closer to Renner’s design, though.