- ISBN: 9780545631631 (sound recording)
- ISBN: 9780545631624 (sound recording)
- Physical Description: 1 online resource (8 audio files) : digital
- Edition: Unabridged.
- Publisher: New York City : Scholastic Audio, 2013.
|General Note:|| Unabridged.
|Participant or Performer Note:|| Narrator: Charlie McWade.
|Summary, etc.:|| In this extraordinary adventure story, Billy Bartram, his father, and a secret society of philosophers and scientists venture into the American wilderness in search of the lost people of the Welsh prince Madoc. Traveling in a flying airship, the members of the expedition and Billy face hazards greater than he can ever imagine as, together with his father, he gets caught up in the fight for the biggest prize of all: America.
|Target Audience Note:|| 620 Lexile.
|System Details Note:|| Requires OverDrive Listen (file size: N/A KB) or OverDrive app (file size: 244296 KB).
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