Zandru's Forge is a science fantasy novel by American writers Marion Zimmer Bradley and Deborah J. Ross, part of the Darkover series; it is set in The Hundred Kingdoms era, at the end of the Ages of Chaos.

Rumail Deslucido, a bitter, corrupt and defeated laranzu, tells his twisted story to his only son, Eduin MacEarn (from The Fall of Neskaya).

He charges Eduin with the duty to enter Arilinn Tower and befriend all, but to secretly kill any Hasturs he can.

[2] He realizes that he is seeing a circle operating in the distant past and concludes that he is seeing the destruction of Hail Tower by Aldaran.

On a ride to Blue Lake, Carolin and Varzil discuss the idea of a pact among all of the Hundred Kingdoms and the Towers, banning laran weapons.

Varzil and Eduin return to the Tower, while Carolin marries the timid woman whom his relatives have selected for him.

Varzil learns that she is the only surviving child of Coryn Leynier and Queen Taniquel Hastur-Acosta (from The Fall of Neskaya), but is sworn to secrecy.

While studying in the archives of Hali Tower, Eduin accidentally learns of Felicia Leynier's true identity.

Carolin, carrying out a promise he has made on his wife's deathbed, takes his two young sons to St. Valentine of the Snows monastery for education.

On his journey back to Thendara, Carolin learns from Orain that his ruthless uncle Rakhal has seized the throne.

Orain swears fealty to Carolin, and they gather forces for a fight with Rakhal and his general, Lyondri.

Loryn Ardais, the Keeper of Hestral, asks for Varzil's assistance in destroying a supply of laran weapons to keep them out of the hands of Rakhal and Lyondri.

They hear through the relays Carolin has pledged to abjure the use of laran weapons, especially clingfire, and that Tramontana Tower has signed on to the pact.

where it is told from a different viewpoint - that of Romilly MacAran who looks after the sentry birds and who is also responsible for Orain's rescue from Lyondri.