Tau Ceti, by Kevin J. Anderson, is free in the Kindle store, courtesy of Phoenix Pick. This is the first book in the
Stellar Guild Series, which will feature a different, big name SF author for each title. Also included with the named novel is a sequel sovelette by Steven Savile. It looks like the second in the series has also been released,
Reboots, by Mercedes Lackey (plus a novelette by Cody Martin); it's only $4.99 and has a very interesting premise on who (or, perhaps, what) should be recruited for space exploration.
Book Description
Jorie Taylor has lived her whole life on the generation ship Beacon. Fleeing an Earth tearing itself apart from its exhaustive demand for resources, the Beacon is finally approaching Sarbras, the planet circling Tau Ceti they hope to make humanity’s new home.
But Earth has recovered from its near-death experience and is now under the control of a ruthless dictator whose sights are set on Tau Ceti as well. President Jurudu knows how to get what he wants—and he wants Sarbras.