If you bought the book on bookapy/zbookstore then it's been updated to fix a few reported typos, and has had a huge compendium added to the end with every active and passive skill created before I began writing the book. over 150! it's currently at version 9, and I'll keep updating the epub as readers report errors, or as I discover them. The Amazon version is much harder to update, so it'll have to wait a bit longer.
Speaking of, if you have bought the book, and can leave a 5 star review at either, or preferably both places, that would be awesome!
PT