9781590173107 | New York Review of Books, April 21, 2009, cover price $16.95

9781439555286 | Reprint edition (Paw Prints, October 1, 2008), cover price $15.99 | About this edition: FOR USE IN SCHOOLS AND LIBRARIES ONLY.

9780394768274 | Amer School Pub, June 1, 1988, cover price $21.35 | About this edition: FOR USE IN SCHOOLS AND LIBRARIES ONLY.

9781424222704, titled "The Twenty-One Balloons" | Fitzgerald Books, January 1, 2007, cover price $15.00 | also contains The Twenty-One Balloons, The Twenty-One Balloons, The Twenty-One Balloons, Twenty-One Balloons | About this edition: A Newbery Medal WinnerProfessor William Waterman Sherman intends to fly across the Pacific Ocean.

9780606050777, titled "The Twenty-One Balloons" | Demco Media, May 1, 1986, cover price $14.53 | also contains Twenty-One Balloons | About this edition: Relates the incredible adventures of Professor William Waterman Sherman who in 1883 sets off in a balloon across the Pacific, survives the volcanic eruption of Krakatoa, and is eventually picked up in the Atlantic.

9781439516348, titled "The Twenty-one Balloons" | Reissue edition (Paw Prints, August 11, 2008), cover price $15.99 | also contains The Twenty-One Balloons, The Twenty-One Balloons, The Twenty-One Balloons, Twenty-One Balloons

9781435208216, titled "The Twenty-one Balloons" | Paw Prints, May 15, 2007, cover price $15.99 | also contains The Twenty-One Balloons, The Twenty-One Balloons, The Twenty-One Balloons, Twenty-One Balloons | About this edition: Relates the incredible adventures of Professor William Waterman Sherman who in 1883 sets off in a balloon across the Pacific, survives the volcanic eruption of Krakatoa, and is eventually picked up in the Atlantic.

9780606126519 | Reprint edition (Demco Media, September 1, 1997), cover price $13.30 | About this edition: Eager to play a shepherd in the Christmas pageant, a mute Appalachian boy is dismayed when a blizzard prevents the performance