editions of Mainspring

Mainspring (Hardcover)
by Jay Lake (Goodreads author)
avg rating: 3.11 (383 ratings)
isbn: 0765317087 (isbn13: 9780765317087)
published: 2007 by Tor Books | binding: Hardcover | pages: 320

Mainspring (Mass Market Paperback)
by Jay Lake (Goodreads author)
avg rating: 2.97 (67 ratings)
isbn: 0765356368 (isbn13: 9780765356369)
published: 2008 (first published 2007) by Tor Science Fiction | binding: Mass Market Paperback | pages: 368