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One of this author's works tells of Roberto della Griva, a nobleman marooned on an abandoned ship on the International Date Line. In another novel by this author, the librarian Berengar persuades a character to have sex with him in exchange for examining the second book of Aristotle's Poetics. This man wrote about Belbo and Casaubon, two of three editors who concoct a conspiracy theory called "The Plan." This author of The Island of the Day Before penned a novel in which William of Baskerville investigates the death of Adelmo and other monks at a Benedictine abbey. For 10 points, name this Italian author of Foucault's Pendulum and The Name of the Rose.
One of this author's works tells of Roberto della Griva, a nobleman marooned on an abandoned ship on the International Date Line.
Umberto Eco