| Large print edition (Ulverscroft Large Print Books, July 30, 2008), cover price $35.50
| Large print edition (Isis Large Print Books, April 1, 2009), cover price $27.99
| Reprint edition (Vintage Books, October 9, 2007), cover price $16.00 | About this edition:
At the end of the eighteenth century, two young Germans set out to measure the world, as Prussian aristocrat Alexander von Humboldt embarks on an odyssey to some of the most remote, unexplored regions on the planet, and astronomer-mathematician Carl Friedrich Gauss uses his mathematical skills to solve some of the greatest puzzles of his age.
| Abridged edition (Gardners Books, April 12, 2007), cover price $27.70 | About this edition:
Features the lives of the naturalist and explorer Alexander von Humboldt and the mathematician and physicist Carl Friedrich Gauss.