"Hidden" is a young adult fantasy novel by Kristin Cast and P. C. Cast, published by St. Martin's Press in 2014. It is part of the House of Night series, offering a mix of fantasy, paranormal, and supernatural elements. The trade paperback format makes it easy to carry and read on the go, with a length of 8.3 inches and a weight of 9.9 ounces. With 320 pages filled with captivating storytelling, this novel is sure to engage readers with its themes of magic, mystery, and personal growth.