10 books in series

Witch World Series 1: The Estcarp Cycle

Witch World Series 1: The Estcarp Cycle is a 10-book series with 10 primary works first released in 1963 with contributions by Andre Norton and Lyn McConchie.

Witch World
Web of the Witch World
Three Against the Witch World
Warlock of the Witch World
Sorceress of the Witch World
Trey of Swords
Ware Hawk
The Gate of the Cat
Ciara's Song
The Duke's Ballad