THE HIDDEN SECRETS OF THE HOLLOW EARTH by Warren Smith

Self plagiarism in Pellucidar! 

Warren Smith rips off his own co-pseudonym "Eric Norman" and his previous volume This Hollow Earth, copying chapter by chapter into this so-called "special report." Little effort is made to disguise the recycling beyond some shuffling in chapter order and occasional change in word choice. Only two sections of the book seem original to the new edition: a brief digression on the Eskimo, and an interview with Ivan T. Sanderson.

Table of contents for Smith's new work:

1.  Mystery of the Hollow Earth (5)

2.  Legends of the Inner Lands (21)

3.  Deros, Teros, and the Shaver Mystery (40)

4.  Enigma of the Polar Openings (69)

5.  Tamil and the Genesis of the Cave Masters (102)

6.  Shamballah: A Paradise Inside Earth (132)

7.  Enigma of the Eskimo (148)

8.  They Believed in the Hollow Earth (163) 

9.  A Journey to the Earth's Interior (179)

10. Are UFOs From Inside the Hollow Earth? (194)

11. Vril Power and the New Race (219)

12. Adolph Hitler: Messiah of Hollow Earth Lore (229)

13. A Scientific View of the Hollow Earth (243)

And once again from This Hollow Earth, for comparison:

1.  The Weird World Inside the Hollow Earth (5)

2.  Mystery of the Hole in the Poles (25)

3.  The Secrets of Shamballah (45)

4.  Doc Anderson - Pyramids, Tunnels, and Tibet (63)

5.  Subterranean Tunnels and Treasure Vaults (85)

6.  The Coming Race and Vril Power (105)

7.  Genesis of the Vril-ya (117)

8.  Adolph Hitler: Messiah of Hollow Earth Lore (129)

9.  Exodus: Demons and the Shaver Mystery (145)

10. Believers in the Hollow Earth (161)

11. Cook and Peary: The North Pole Controversy (179)

12. Tamil and the Cave Masters (197)

Zebra Books, 1976