Now two volumes:
Year 2. Puswhisperer Part Deux: Another Year of Pus. Free for Amazon Prime members.
And on the KindleKindle reader software. Go to the Amazon page on this website. Only 2.99.
Available on the Nook: Barnes and Nobel.
Available on iTunes.
According to Wikipedia "Currently, the ePub format can be read by the Kobo eReader, Apple iBooks, Barnes and Noble Nook, Sony Reader, BeBook, Bookeen Cybook Gen3 (with firmware v. 2 and up),COOL-ER, Adobe Digital Editions, Lexcycle Stanza, BookGlutton, AZARDI, Aldiko and WordPlayer on Android and the Mozilla Firefox add-on EPUBReader" as well as calibre (an open source eBook reader/manager).
Kindle reader for most major platforms can be downloaded at http://www.amazon.com/gp/feature.html/ref=sa_menu_karl3?ie=UTF8&docId=1000493771.