• Publication: Tarzan at the Earth's Core / Tarzan the InvinciblePublication Record # 856680
• Author: Edgar Rice Burroughs
• Date: date unknown
• ISBN: 0-345-41349-0 [978-0-345-41349-9]
• Publisher: Del Rey / Ballantine
• Price:
  $6.99^?$: US dollar
• Format:
  pb^?Paperback. Typically 7" by 4.25" (18 cm by 11 cm) or smaller, though trimming errors can cause them to sometimes be slightly (less than 1/4 extra inch) taller or wider/deeper.
• Type: OMNIBUS
• Cover: Tarzan at the Earth's Core / Tarzan the Invincible (1997) • by Brom [as by Gerald Brom]
• Notes: Third printing per number line: 10 9 8 7 6 5 4 3. Source: Edgar Rice Burroughs: The Descriptive Bibliography of Ace and Ballantine / Del Rey Paperback Books (title, author, date, publisher, format, ISBN, price, printing, cover artist).

Fiction and Essays (view Full Listing)

• Tarzan the Invincible • [Tarzan • 14] • (1931) • novel by Edgar Rice Burroughs
• Tarzan at the Earth's Core • [Tarzan • 13] • (1930) • novel by Edgar Rice Burroughs