Oracles

Moralia, in fifteen volumes, with an English translation by Frank Cole Babbitt.

Plutarch

The burning maze

Rick Riordan

Kingdom of the Golden Dragon

Isabel Allende ; translated from the Spanish by Margaret Sayers Peden.

Dust to dust

by Heather Graham.

Black Ships

Jo Graham

Sif and the dwarfs' treasures

Joan Holub & Suzanne Williams

Histoire des oracles

par M. de Fontenelle ...

Daga negra

Eric Lustbader.

Hekate soteira: a study of Hekate's role in the Chaldean oracles and related literature

Sarah Johnston.

The Road to Delphi: The Life and Afterlife of Oracles

Michael Wood