When you pay for an exclusive, restricted-circulation PDF, you are paying for a decade of a sinologist’s labor. Libraries charge institutional subscriptions; private translators rely on Patreon or direct sales. Beware of websites offering a "free exclusive PDF." If it is free and marketed as exclusive, it is likely a pirated copy of a copyrighted work (such as the 2006 partial translation) or a malware trap.

You may be able to borrow the James R. Ware translation digitally via the Internet Archive/Open Library .

While full PDF versions of academic translations are rarely available for free due to copyright, the following are the definitive English sources: Translated by James R. Ware as

★★★★☆ (4/5 – Valuable but with caveats)