To be helpful: is widely considered one of the most respected modern translations. However, there is no official, legal free PDF of the full copyrighted book.

Here is a concise, useful review of the content of Huang's work, which is what most people actually want when searching for the PDF: Overall Verdict: ⭐⭐⭐⭐ (4.5/5) – Best for readers who want a traditional, Confucian, spiritually grounded version with clear practical guidance.

It sounds like you're looking for a of a PDF resource related to the I Ching (Yijing) by an author named Alfred Huang .