hecksjeAh cool! I've been looking for a copy of Nigel Richmond's The Language of the Lines ever since I came across it in the Yi Jing iOS app (where it's bundled with other digital books). It's been out of print since the 70s and remains one of the most approachable sources on the Yi Jing that I could find (I've studied the Yi Jing for many years, but I won't speak to whether the book is wholly accurate or not).
It turns out that Joel Biroco has a biography on Nigel Richmond and includes his two out of print books! (Don't tell Amazon who sells a Kindle version)
Yijing Dao - Nigel Richmond and the I Ching
Yijing Dao - Calling Crane in the Shade: A website dedicated to reviews of books on the Yijing or I Ching, the ancient Chinese oracle known as the Book of Changes, but also containing a complete 'Introduction to Yijing' for beginners, an accurate transcription of the 1935 Harvard-Yenching Zhouyi, animations of hexagram sequences, articles, and scans of Chinese diagrams.