Legendary Heroes
From Author Wars - https://authorwars.com/books/legendary-heroes-81790.html
Editions/Publications:
- Unknown. Twice Seven (Unknown, Ben Bova, Avon Eos, ISBN-10: 0380797410, $6.50, 290 pages, Paperback, Collection)
- Unknown. Dragon Magazine, December 1996 (Unknown, Ben Bova, TSR, ISBN-10: 0786905654, $4.95, 124 pages, bedsheet, MAGAZINE)
- Unknown. Twice Seven (Unknown, Ben Bova, ReAnimus Press, ISBN-10: 9781542678926, $13.99, 286 pages, Trade Paperback, Collection)
- 2014 . Twice Seven (2014, Ben Bova, ReAnimus Press, $3.99, ebook, Collection)