Amazon currently offers the Contamination Boxed Set (Books 0-3) by T.W. Piperbrook as a free Kindle download. You can add Audible narration for an additional $1.99 by checking the box beneath the 'Buy Now' button. These eBooks typically go for $3/ea.
This virtual box set includes the first four titles in the Contamination series: Zero, The Onset, Crossroads, and Wasteland.
The infection has begun, ravaging the American Southwest and leaving a chaos in its wake. In this new world, there will be last meal, no dying wish. The only reward left is to survive another day...
Rated 4.1/5 stars by over 700 Amazon customers. Check out the rest of the series here.