2026 Reading Challenge
The Sigma Protocol

Questions About The Sigma Protocol

by Robert Ludlum

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What number in the sequence of novels by R Ludlum is this one?
Elliot J. It is the last one he wrote before his death. Subsequent ones are written by other authors and the published as "Robert Ludlum's xxxxxx by yyyyyy"…moreIt is the last one he wrote before his death. Subsequent ones are written by other authors and the published as "Robert Ludlum's xxxxxx by yyyyyy"(less)
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