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The Demon Crown is the 13th novel in James Rollins' Sigma Force series, where the elite covert team must face an ancient, resurrected insect-based threat that spreads like a plague. To stop the "extinction-level threat," Commander Grayson Pierce must make an impossible choice to join forces with his sworn enemy, the resurrected Guild, even if it costs the life of one of his own team members. The mystery is tied to an old cache of bones preserved in amber, hidden beneath the National Mall by a cabal of scientists led by Alexander Graham Bell, which holds a dangerous secret and a terrifying new weapon.
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