The Happiness Project > Editions
by Gretchen Rubin First published 2009
Published December 29th 2009
by Harper
1, Hardcover, 301 pages
Published 2011
by Harper
Reprint, Paperback, 315 pages
Published October 30th 2018
by Harper Paperbacks
10th Anniversary Edition, Kindle Edition, 0 pages
Published December 29th 2009
by HarperCollins e-books
Reprint, Kindle Edition, 289 pages
Published December 29th 2015
by Harper Paperbacks
Revised, Kindle Edition, 350 pages
Published October 30th 2018
by Harper Paperbacks
10th Anniversary Edition, Paperback, 368 pages
Published December 29th 2015
by Harper Paperbacks
Revised, Paperback, 368 pages
Published October 25th 2011
by Harper
Reprint, Paperback, 368 pages
Published April 16th 2012
by HarperCollins Publishers Ltd
Twenty-fifth Printing, Paperback, 336 pages