A reasonably up-to-date list of English books:
https://senseis.xmp.net/?GoBooksMost books are still printed, although quite a few have (also) been published as files.
Retailers / Authors for go books as files:
- Amazon US / UK / DE / JP: mostly Kindle
- Smart Go Books software
- Robert Jasiek, all my books as PDFs:
http://home.snafu.de/jasiek/shop.html- John Fairbairn: quite a few books as Kindle or Smart Go Books, GoGoD database
- some Asian books as Kindle or CDs
- Yutopian: very few old books as PDFs
- copycats and a few others: various, mostly old books, mostly as Kindle
- various authors: a few original, particularly noteworthy free PDFs, such as Shape Up!
Most active retailers of printed English / German books:
- Amazon US / UK / DE
- Kiseido US / JP and Yutopian
- Schaak en Go Winkel het Paard / Goshop Keima from NL
- Hebsacker Verlag from DE
- Jeux du Monde from FR
- Brett und Stein Verlag from DE: mostly German books
- Robert Jasiek from DE: my books
Different retailers offer different selections of books so check them all. International postages vary extremely (from ca. €2 to €40 for one book) from retailer to retailer so check different retailers. Note customs / tariffs, where applicable. Several former publishers went out of business. There are further, smaller authors / publishers / retailers of English books.