Hardcover book titled "The Bobbsey Twins at Mystery Mansion," authored by Laura Lee Hope and published by Grosset & Dunlap. The copyright page indicates a publication year of 1945. The front cover artwork depicts two children and a dog, consistent with the series' themes. The book's spine is intact, and the page edges are tinted green.
The rear cover features an advertisement for the Honey Bunch & Norman book series. Interior endpapers display printed illustrations with motifs related to the stories. The table of contents lists twenty-five chapters.
The book shows some shelf wear and minor discoloration on the spine and cover edges. See photos for Measurements if Measurements were taken.