OPUS: #020
 Title: Cities in the Air
 Author: Edmond Hamilton
 Year: 1929
 Type: novel
 “Our gunners, following the orders of the First Air Chief, were concentrating their fire on the European column’s head, there in the ocean’s green depth.” – Nov. 1929
 “Now our line turned like a wheeling snake, high in the air and was rushing back upon the circle of our enemies. And as our long line of mighty cities whirled past them all our batteries were thundering.” – Dec. 1929
 Magazine Appearances:
- Cities in the Air (Part 1 of 2) (1929) – Edmond Hamilton
 
- Cities in the Air (Part 2 of 2) (1929) – Edmond Hamilton
 
Publications:
- Air Wonder Stories, Vol. 1, no. 5, November 1929, (Nov 1929, ed. Hugo Gernsback, publ. Stellar Publications, $0.25, 96pp, magazine), pp. 390-411. Cover: Frank R. Paul; illustrated by Frank R. Paul and unsigned.
 
- Air Wonder Stories, Vol. 1, no. 6, December 1929, (Dec 1929, ed. Hugo Gernsback, publ. Stellar Publications, $0.25, 96pp, magazine), pp. 534-554. Cover: Frank R. Paul; illustrated by Frank R. Paul and unsigned.
 
- The Universe Wreckers, The Collected Edmond Hamilton, Volume Three, (Aug 2010, Edmond Hamilton, publ. Haffner Press, 978-1-893887-41-1, $40.00, 670pp, hc, coll)
 
Reviews:
- Review by Everett F. Bleiler (1998) in Science-Fiction: The Gernsback Years
 
ebook: http://www.pulpmags.org/air_wonder_page.html
 ebook: http://comicbookplus.com/?cid=2610
 ebook of part 1: https://archive.org/details/Air_Wonder_Stories_v01n05_1929-11
 ebook of part 2: https://archive.org/details/Air_Wonder_Stories_v01n06_1929-12.Stellar_bogof39-cape1736