9780544031593 | 1 edition (Houghton Mifflin, August 5, 2014), cover price $28.00

9780544334465 | Reprint edition (Mariner Books, April 7, 2015), cover price $14.95

9780379209204, titled "International Law of Peace" | Oceana Pubns, June 1, 1990, cover price $35.00 | also contains International Law of Peace

9781444330229 | Blackwell Pub, January 18, 2011, cover price $21.95 | About this edition: Progressing from the first flirtatious moment of eye contact to the selection of a “mate,” this enlightening book offers playful philosophical explorations of the dating game for anyone who has dated, is dating, or intends to date again.

9780553807424 | Bantam Dell Pub Group, January 27, 2009, cover price $35.00

9780618551163 | Houghton Mifflin, September 27, 2005, cover price $25.00 | About this edition: A reassessment of the life of Abraham Lincoln argues that America's sixteenth president suffered from depression and explains how Lincoln used the coping strategies he had developed to face the crises of the Civil War and personal tragedy.

9780618773442 | Reprint edition (Mariner Books, October 2, 2006), cover price $15.95 | About this edition: A dramatic reassessment of the life and era of Abraham Lincoln argues that America's sixteenth president suffered from depression and explains how Lincoln used the ailment and the coping strategies he had developed to deal with the crises of the Civil War and personal tragedy.

9781598870046 | Unabridged edition (Highbridge Co, September 22, 2005), cover price $36.95 | About this edition: A dramatic reassessment of the life and era of Abraham Lincoln argues that America's sixteenth president suffered from depression and explains how Lincoln used the ailment and the coping strategies he had developed to deal with the crises of the Civil War and personal tragedy.

9781439562604 | Reprint edition (Paw Prints, October 10, 2008), cover price $23.95

9781602520073 | Unabridged edition (Findaway World Llc, April 1, 2007), cover price $39.99

9781602525078 | Unabridged edition (Findaway World Llc, April 1, 2007), cover price $44.99 | About this edition: Argues that President Lincoln suffered from depression ranging from major to chronic, that he suffered two major breakdowns, and that by shifting his goal away from personal contentment to universal justice, he was able to lead the country through the civil war.