Which of these is NOT part of the Robert Langdon series?

Great, you answered "Origin".

See here what other people have answered:

  • Inferno
  • Origin
  • The Lost Symbol
  • Digital Fortress
25%
23%
25%
26%
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Interesting fact:

It was Sidney Sheldon’s novel, “The Doomsday Conspiracy,” that inspired Brown to become a writer of thrillers. He abandoned his pursuit of a music career and his teaching job in 1996 to become a full-time writer.

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