The five volumes of the Learn to Play Go series are now available as EPUB, which opens them up to readers on Android and Windows. Janice Kim’s award-winning series takes the complete beginner step-by-step all the way to playing real Go.
(Of 142 books in Go Books, all but 7 are now available as EPUB.)
EPUB App Recommendations
I’ve updated my recommendations of EPUB readers. On Android, I suggest you try Reasily and Adobe Digital Editions. On Windows, Readium Desktop seems to be working better than calibre. Each one comes with its own set of issues, no perfect choice out there. Please let me know what’s working for you, and keep providing feedback directly to the developers of these apps to help improve them.