: Provides direct downloads for the Russian version in TXT (261 kb) , as well as FB2, DOC, and RTF.
: The best source for the original English text . While they prioritize EPUB and Kindle formats, you can easily copy the "Plain Text UTF-8" version into a .txt file. About the Book Hearts of Three by Jack London - Old Books by Dead Guys
You can find the Russian translation or the original English text at these sources:
: A well-known digital library where you can download the book in TXT or TXT.zip for easier mobile reading.