The product is a lot of 4 books by Dan Brown from the Robert Langdon book series, including "Angels & Demons", "The Da Vinci Code", "The Lost Symbol", and "Inferno". The books are hardcover first editions in English, intended for an adult audience. They feature illustrations and are part of the 2000s era. These novels fall under the fiction narrative type and the author, Dan Brown, is known for his intriguing and suspenseful storytelling that combines elements of mystery, religion, and symbolism.
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