Historical clue formulations

• Ancient book of divination — 2026-05-14
• Ancient Chinese book of divination — 2019-09-02
• Chinese divination book — 2015-04-21
• Source of the quote "Change is certain" — 2015-02-07
• Ancient Chinese divination book — 2011-11-22
• Book of hexagrams — 2004-04-01
• Book of Changes — 2000-06-18
• Chinese book of divination — 1996-09-11
• "Book of Changes" — 1995-11-24