The Book of the New Sun can refer to the following real-life and fictional books:
- The Book of the New Sun, the real-life series of novels by Gene Wolfe that this wikia is about
- The Book of the New Sun, the fictional account by Severian which Gene Wolfe ostensibly recovered, translated to English, and published under the same name in real life
- The Book of the New Sun, a fictional long-lost book (possibly written by Canog during the reign of Typhon the Monarch) that Severian named his book after; this book forms the basis of the New Sun and Conciliator mythos by Severian's time, and Dr Talos's play Eschatology and Genesis