editions of Rollback

Rollback (Hardcover)
by Robert J. Sawyer
avg rating: 3.59 (430 ratings)
isbn: 0765311089 (isbn13: 9780765311085)
published: 2007 by Tor Books | binding: Hardcover | pages: 320

Rollback (Mass Market Paperback)
by Robert J. Sawyer
avg rating: 3.42 (61 ratings)
isbn: 0765349744 (isbn13: 9780765349743)
published: 2008 (first published 2007) by Tor Books | binding: Mass Market Paperback | pages: 320