Volume 2, print edition, each print edition collects two digital chapters, the digital chapters can be found here.
The first issue of Volume 2 storyline "The Taint Train of Terror!" was initially published by Super Real Graphics in March 2012, and the second issue was self-published by Dan Mendoza later in 2012. Both issues are being republished by Action Lab and will be followed with four more issues in January 2014, thus completing this storyline.
Volume 1 has been collected and published by Action Lab in 2013.
Collected in Zombie Tramp vol. 2.