Gail, Otto Willi. BY ROCKET TO THE MOON: THE STORY OF HANS HARDT'S MIRACULOUS FLIGHT.

New York: Sears Publishing Company, Inc., [1931]. Octavo, pp. [1-2] [i-iv] v-vii [viii] ix-xi [xii] 1-303 [304-306] [note: first and last leaves are blanks], eight inserted plates with illustrations by R. V. Grunberg, original pictorial black cloth, front and spine panels stamped in red, top edge stained red, other edges untrimmed. First edition in English. (#146506)
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Gail, Otto Willi. DER SCHUSS INS ALL. EIN ROMAN VON MORGEN.

Breslau: Bergstadtverlag, [1925]. Octavo, pp. [1-6] 7-277 [278: ad] [279: publisher's device] [280: blank], six full page illustrations in the text by Max Odoy who also made the cover illustration, title page printed in blue and black, original pictorial blue cloth, front and spine panels stamped in orange, yellow and black, top edge stained brown. First edition. (#147186)
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Gail, Otto Willi. DER STEIN VOM MOND. KOSMISCHER ROMAN.

Breslau: Bergstadtverlag, [1926]. Octavo, pp. [1-6] 7-286 [287] [288: ad], original pictorial orange cloth, front, spine and rear panels stamped in black, top edge stained black. First edition. (#147188)
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Gail, Otto Willi. ENERGIESAMMLER HA DE WE. DIE GESCHICHTE EINER ERFINDUNG.

Breslau: Bergstadtverlag Wilh. Gottl. Korn, [1929]. Octavo, pp. [1-4] 5-125 [126: illustration] [127: contents] [128: blank], illustrations by Walter Bayer, original pictorial cream boards printed in blue and black with gray cloth shelf back, spine panel stamped in black. First edition, first printing. (#133895)
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Gail, Otto Willi. MIT RAKETENKRAFT INS WELTENALL: VOM FEUERWAGEN ZUM RAUMSCHIFF. Mit einem Vorwort von Max Valier und vielen Bildern, Zeichnungen und Originalphotographien.

Stuttgart: K. Thienemanns Verlag, [1928]. Octavo, pp. [1-4] 5 [6-8] 9-106 [107-108] [109-111: ads] [112: publisher's device], eight inserted plates with illustrations on rectos and versos, other illustrations and diagrams in the text by Max Valier, cloth-backed pictorial boards (fine illustration by Chomton on front panel). First edition. (#146523)
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