The Happiness Project > Editions
by Gretchen Rubin First published 2009
Published December 29th 2009
by HarperAudio
Audible Audio
Published November 2011
by Ica Bokförlag
Hardcover, 281 pages
Published October 2010
by Scherz Verlag GmbH
Hardcover, 384 pages
Published 2020
by Bloombooks, NXB Thế Giới
Paperback, 240 pages
Published December 1st 2011
by Det blå hus
Paperback, 352 pages
Published January 1st 2009
Hardcover, 0 pages