The Harvesters of Jove    by Tarry Ionta
Price: $2.45 USD. 71670 words. Published on October 12, 2010. .
Taylor Lee, an agent for the PLGA, is sent on a routine assignment to Callisto, after mishandling a drugs investigation. Lee finds himself up against the power of a mining corporation. The corporation requires massive amounts of oxygen, and will stop at nothing to get it - not even genocide. Can Lee prevent the destruction of what appears to be an intelligent life form on Jupiter?

Cavernauts    by David Bartell
Price: $0.99 USD. 13990 words. Published on August 28, 2011. .
Two men journey deep into Jupiter's moon Callisto to rescue a beloved teammate before time runs out. And just what wondrous but deadly secret is hidden at the bottom of the frozen cavern?

Callisto Novelette: Nancy and the Caveman    by Erica Conroy
Price: $1.49 USD. 16530 words. Published on December 8, 2011. .
Callisto renders medical and security assistance to the colonists on Markola IV. It seems some unknown force is attacking the colony and during one such skirmish, Nancy is separated from the group and wakes up in the clutches of the enemy. A very attractive enemy…

Mission to Jupiter: A History of the Galileo Project - Comprehensive History of the Epic Exploration of Jupiter and its Moons, Io, Europa, Callisto, Failures and Triumphs (NASA SP-2007-4231)    by Progressive Management
Price: $9.99 USD. 135850 words. Published on January 20, 2012. .
This official NASA history document - converted for accurate flowing-text e-book format reproduction - is a comprehensive account of the epic Galileo probe of Jupiter and its moons, recounting the difficult path to launch, the change in Shuttle upper stages after the Challenger accident, the high gain antenna and tape recorder anomalies, and the enormous scientific success of the mission.