“The Really Big Book the Book of Unsolved Mysteries” by Publications International, The Limited is a hardcover book filled with intriguing unsolved mysteries from the realms of true crime, games & activities, and reference. Published in 2020 as part of “The Book of Ser.” series, this book covers subjects such as hoaxes & deceptions, curiosities & wonders, and trivia, making it a captivating read for those interested in the mysterious and the unexplained. With 640 pages of engaging content, this book is sure to keep readers entertained and curious.