 Charles had an interest in hunting, and he wrote a book on the subject, "La Chasse Royale", which was published long after his death, in 1625.It is a valuable source for those interested in the history of hounds and hunting.<ref>Charles IX, "La Chasse Royale" (1625).</ref>

Charles IX is a supporting character in Alexandre Dumas's 1845 historical novel "Queen Margot", which focuses on the marriage between Henry of Navarre and Margaret of Valois.The book depicts Charles as both a cold-hearted king who takes pleasure in the hunt, and a lonely and vulnerable man, influenced in politics by his relatives and allies.