The Dream-Quest of Unknown Kadath
The "Seven Cryptical Books of Hsan" is a collection of writings mentioned by Lovecraft in "The Other Gods" (1921) and "The Dream-Quest of Unknown Kadath" (1926). In both stories, the books are mentioned in conjunction with the Pnakotic Manuscripts. They are kept in the temple of the Elder Ones in the city of Ulthar; no other existing copies are mentioned in Lovecraft's works. Barzai the Wise studied the books before his journey to see the gods dancing on Mount Hatheg-Kla, while Randolph Carter consulted them during his quest to reach Kadath. Other than that, little is known about them.