The Happiness Project > Editions
by Gretchen Rubin First published 2009
Published February 16th 2016
by Harper
Revised, Mass Market Paperback, 400 pages
Published 2013
by Nemo
Paperback, 336 pages
Published June 26th 2012
by HarperCollins Publishers
Kindle Edition, 336 pages
Published January 1st 2009
by Harper
Paperback, 0 pages
Published April 20th 2010
by Harper Perennial
International ed., Paperback, 320 pages
Published April 6th 2011
by Nasza Księgarnia
Hardcover, 406 pages
Published July 5th 2012
by 早安財經文化有限公司
Paperback, 384 pages