Robbins, Dianne(b. 1939). Messages from the Hollow Earth. Victoria, BC, Canada: Trafford, 2003.

Robbins, Dianne(b. 1939). We Are Not Alone: Messages from the Hollow Earth and the Subterranean City of Telos. Mt. Shasta, CA:: Mt. Shasta Light Pub., 2000.

Robbins, Dianne(b. 1939). Telos: The Call Goes Out from the Hollow Earth and the Underground Cities. Rochester, NY: Author, 1996.