Hardback Editions
February 2000 : USA Library Binding
Title: Mostly Harmless (Turtleback School & Library Binding Edition)
Author(s): Douglas Adams
ISBN: 1-4177-0821-2 / 978-1-4177-0821-5 (USA edition)
Publisher: Turtleback Books
Availability:
Amazon Amazon UK Amazon CA February 2000 : USA Library Binding
Title: Mostly Harmless (Hitchhiker's Guide)
Author(s): Douglas Adams
ISBN: 0-606-27569-X / 978-0-606-27569-9 (USA edition)
Publisher: Demco Media
Availability:
Amazon Amazon UK Amazon CA February 2000 : USA Library Binding
Title: Mostly Harmless (Hitchhiker's Trilogy)
Author(s): Douglas Adams
ISBN: 0-7569-4815-0 / 978-0-7569-4815-3 (USA edition)
Publisher: Perfection Learning
Availability:
Amazon Amazon UK Amazon CA October 1993 : USA Library Binding
Title: Mostly Harmless Mostly Harmless
Author(s): Douglas Adams
ISBN: 0-613-13946-1 / 978-0-613-13946-5 (USA edition)
Publisher: Turtleback Books: A Division of Sanval
Availability:
Amazon Amazon UK February 1996 : UK Hardback
Title: Mostly Harmless (ISIS Large Print)
Author(s): Douglas Adams
ISBN: 1-85695-333-5 / 978-1-85695-333-7 (UK edition)
Publisher: ISIS Large Print Books
Availability:
Amazon Amazon UK May 1995 : USA Hardback
Title: Mostly Harmless
Author(s): Douglas Adams
ISBN: 0-517-14555-3 / 978-0-517-14555-5 (USA edition)
Publisher: Random House Value Publishing
Availability:
Amazon Amazon UK Amazon CA October 1992 : USA Hardback
Title: Mostly Harmless
Author(s): Douglas Adams
ISBN: 0-517-57740-2 / 978-0-517-57740-0 (USA edition)
Publisher: Harmony
Availability:
Amazon Amazon CA October 1992 : UK Hardback
Title: Mostly Harmless
Author(s): Douglas Adams
ISBN: 0-434-00926-1 / 978-0-434-00926-8 (UK edition)
Publisher: William Heinemann
Availability:
Amazon Amazon UK Amazon CA October 1992 : UK Hardback
Title: Mostly Harmless - Canadian Dumpbi
Author(s): Douglas Adams
ISBN: 0-434-89423-0 / 978-0-434-89423-9 (UK edition)
Publisher: William Heinemann Ltd
Availability:
Amazon Amazon UK Paperback Editions
1992 : UK Paperback
Title: Mostly Harmless (The Hitchhiker's Guide to the Galaxy)
Author(s): Douglas Adams
ISBN: 1-5098-0838-8 / 978-1-5098-0838-0 (UK edition)
Publisher: Pan
Availability:
Amazon Amazon UK Amazon CA August 2009 : UK Paperback
Title: Mostly Harmless: 5 (The Hitchhiker's Guide to the Galaxy)
Author(s): Douglas Adams
ISBN: 0-330-50858-X / 978-0-330-50858-2 (UK edition)
Publisher: Pan
Availability:
Amazon Amazon UK Amazon CA February 2000 : USA Mass Market Paperback
Title: Mostly Harmless (Hitchhiker's Guide to the Galaxy)
Author(s): Douglas Adams
ISBN: 0-345-41877-8 / 978-0-345-41877-7 (USA edition)
Publisher: Del Rey
Availability:
Amazon Amazon UK December 1993 : UK Paperback
Title: Mostly Harmless (Hitch Hiker's Guide to the Galaxy)
Author(s): Douglas Adams
ISBN: 0-330-32311-3 / 978-0-330-32311-6 (UK edition)
Publisher: Chivers Press
Availability:
Amazon Amazon UK Amazon CA March 2002 : UK Paperback
Title: Mostly Harmless (The hitch hiker's guide to the galaxy)
Author(s): Douglas Adams
ISBN: 0-330-49122-9 / 978-0-330-49122-8 (UK edition)
Publisher: Picador
Availability:
Amazon Amazon UK Amazon CA October 1993 : USA Paperback
Title: Mostly Harmless (Hitchhiker's Guide to the Galaxy)
Author(s): Douglas Adams
ISBN: 0-345-37933-0 / 978-0-345-37933-7 (USA edition)
Publisher: Del Rey
Availability:
Amazon Amazon UK Amazon CA October 1992 : UK Paperback
Title: Mostly Harmless.
Author(s): Douglas Adams
ISBN: 0-434-89467-2 / 978-0-434-89467-3 (UK edition)
Publisher: William Heinemann Ltd
Availability:
Amazon Amazon UK Amazon CA Audio Editions
December 2012 : USA Audio edition
Title: Mostly Harmless
Author(s): Douglas Adams
Publisher: Macmillan Digital Audio
Availability:
Amazon December 2012 : UK Audio edition
Title: Mostly Harmless
Author(s): Douglas Adams
Publisher: Macmillan Digital Audio
Availability:
Amazon UK December 2006 : UK Audio CD
Title: Mostly Harmless
Author(s): Douglas Adams
ISBN: 1-4050-9088-X / 978-1-4050-9088-9 (UK edition)
Publisher: Macmillan Digital Audio
Availability:
Amazon UK October 2006 : USA Audio CD
Title: Mostly Harmless
Author(s): Douglas Adams
ISBN: 0-7393-3213-9 / 978-0-7393-3213-9 (USA edition)
Publisher: Random House Audio
Availability:
Amazon Amazon UK Amazon CA October 2006 : USA Audio CD
Title: Mostly Harmless (Hitchhiker's Guide, #5)
Author(s): Martin Freeman (Narrator) Douglas Adams (Author)
ISBN: 1-4159-3318-9 / 978-1-4159-3318-3 (USA edition)
Publisher: Books On Tape
Availability:
Amazon Amazon CA September 2006 : USA Audio edition
Title: Mostly Harmless
Author(s): Douglas Adams
Publisher: Random House Audio
Availability:
Amazon September 2006 : Canada Audio edition
Title: Mostly Harmless
Author(s): Douglas Adams
Publisher: Random House Audio
Availability:
Amazon CA May 2006 : USA Audio CD
Title: Mostly Harmless
Author(s): Douglas Adams
ISBN: 1-59777-003-5 / 978-1-59777-003-3 (USA edition)
Publisher: Phoenix Audio
Availability:
Amazon Amazon CA December 2002 : UK Audio Cassette
Title: Mostly Harmless: Complete & Unabridged
Author(s): Douglas Adams
ISBN: 0-7540-0954-8 / 978-0-7540-0954-2 (UK edition)
Publisher: Chivers Audio Books
Availability:
Amazon UK Amazon CA May 2002 : USA Audio Cassette
Title: Mostly Harmless
Author(s): Douglas Adams
ISBN: 1-59007-258-8 / 978-1-59007-258-5 (USA edition)
Publisher: New Millenium Audio
Availability:
Amazon May 2002 : USA Audio CD
Title: Mostly Harmless
Author(s): Douglas Adams
ISBN: 1-59007-259-6 / 978-1-59007-259-2 (USA edition)
Publisher: New Millenium Audio
Availability:
Amazon Amazon CA December 2001 : USA Audio Cassette
Title: Mostly Harmless
Author(s): Douglas Adams
ISBN: 1-57453-482-3 / 978-1-57453-482-5 (USA edition)
Publisher: Audio Literature
Availability:
Amazon Amazon CA June 1994 : UK Audio Cassette
Title: Mostly Harmless: Complete & Unabridged
Author(s): Douglas Adams
ISBN: 1-85695-758-6 / 978-1-85695-758-8 (UK edition)
Publisher: Isis Audio Books
Availability:
Amazon Amazon UK Amazon CA June 1994 : UK Audio Cassette
Title: Mostly Harmless: Complete & Unabridged
Author(s): Douglas Adams
ISBN: 1-85695-837-X / 978-1-85695-837-0 (UK edition)
Publisher: ISIS Audio Books
Availability:
Amazon UK Amazon CA October 1992 : USA Audio Cassette
Title: Mostly Harmless
Author(s): Douglas Adams
ISBN: 1-55800-568-4 / 978-1-55800-568-6 (USA edition)
Publisher: Dove Entertainment Inc
Availability:
Amazon Amazon CA Kindle Editions
September 2009 : USA Kindle edition
Title: Mostly Harmless (Hitchhiker's Guide to the Galaxy Book 5)
Author(s): Douglas Adams
Publisher: Del Rey
Availability:
Amazon September 2009 : Canada, UK Kindle edition
Title: Mostly Harmless (Hitchhiker's Guide to the Galaxy Book 5)
Author(s): Douglas Adams
Publisher: Pan
Availability:
Amazon UK Amazon CA 
