The book is migrated to LuaLaTeX from ConTeXt and now uses https://github.com/jemmybutton/byrne-latex. Compared to previous ConTeXt version, this one has a lot of mistakes and typos fixed, but general layout still requires a lot of tweaks after migration.

Multiple typos fixed in the Russian translation,
improved lettrines,
other minor fixes and improvements.

Book fits A5 paper now,
font changed to EB Garamond,
improved lettrines,
improved colors.
Some other minor improvements and corrections.

Many invalid cross-references fixed,
optical angle size compensation added,
many typos fixed in the Russian version,
some other minor corrections and improvements.

Many typos fixed + some other minor improvements.
Russian translation added.

Many typos fixed, improved lettrines

Many typos fixed