The Heritage of Hastur is a science fantasy novel by American writer Marion Zimmer Bradley, part of the Darkover series.

While riding from Nevarsin to Thendera, Regis Hastur's party encounters Kennard Alton and his sons, Lewis and Marius.

Members of the Comyn Council meet with the Terran Legate regarding rumors that forbidden weapons are being sold in the city of Caer Donn.

The Comyn claim that this is a breach of both the Compact (Darkovan tradition concerning weapons) and of the Terran Empire's treaty with the council.

After an argument, Danilo reveals the details of Dyan Ardais’ attempt to rape him, both physically and telepathically.

Lew is introduced to his cousin, Beltran, and Lord Aldaran's foster children, Marjorie, Thyra and Rafe Scott, and the mysterious Robert Kadarin.

Kermiac Aldaran dies as a result of the Sharra Matrix experiments, largely due to a mistake made by the increasingly insane Thyra.