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Macmillan Audio
Macmillan Audio
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Science
2
Physics
2
Nonfiction
2
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1
Creators
Caleb Scharf
2
Format
OverDrive MP3 Audiobook
2
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2
OverDrive WMA Audiobook
1
Gravity's Engines
Caleb Scharf
Author
Caleb Scharf
Narrator
(2012)
The Copernicus Complex
Caleb Scharf
Author
Caleb Scharf
Narrator
(2014)