The product is a set of four Skulduggery books by Derek Landy, specifically from the "After Dark" book series. The books are in paperback format and are written in English, making them suitable for young adult readers. The books are not personalised, signed, or inscribed, and were not originally published with an ex libris note. The product was manufactured in the United Kingdom by HarperCollins, and the narrative type is fiction, with a focus on magical and suspenseful themes.
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