Peignot

Peignot is a sans-serif display typeface, designed by the poster artist A. M. Cassandre in 1937. It was commissioned by the French type foundry Deberny & Peignot. The typeface is notable for not having a traditional lowercase, but in its place a "multi-case" combining traditional lowercase and small capital characters. Cassandre intended for Peignot to be used in publishing and stated that "[t]here is no technical reason in printing why we cannot return to the noble classical shapes of the alphabet and discard the lower case forms." The typeface achieved some popularity in poster and advertising publishing from its release through the late 1940s. Stylistically Peignot is a "stressed" or modulated sans-serif in the Art Deco style, in which the vertical strokes are clearly wider than the horizontals.

From the Wikipedia article “Peignot (typeface)”, licensed under CC BY-SA 4.0.

Sans-serif faces work well for headings, captions, children's books and modern nonfiction. For long-form body text in print, most designers still prefer a serif.

Commercial typefaces require a licence that covers embedding in PDFs and ebooks; check the foundry's licence before you publish.