Inspired by Scott’s Hyperlinked Literary Canon for The World of Thool.
Literature Available Online
The Oresteia by Aeschylus (note: the books is called “House of Atreus” which is an alternate title for the three plays as a group)
Electra by Euripides
Iphigeneia in Tauris, and Orestes by Euripides (they are in the larger work referenced)