While investigating the theft of a valuable idol, Frank and Joe enounter a terrified business woman, a walking mummy, and a weird glass eye.

When the Hardys' wealthy neighbor is robbed, Joe and Frank are asked by their father to help solve the case.

The Bobbsey Twins in the Country by Laura Lee Hope is a children's novel published in 1907, and it is the fourth book in the Bobbsey Twins series. The book follows the adventures of the Bobbsey family, which consists of two sets of fraternal twins - Bert and Nan, and Flossie and Freddie - and their parents, as they move from the city to a farm in the countryside. The Bobbseys settle into their new life in the country, where they meet their new neighbors...

Brief rhymes and drawings of activities popular in the nineteenth century portray events that occur in each month of the year.

Once again Frank and Joe Hardy accept the challenge of a puzzling case when their famous detective father asks the boys to assist him in tracking down a notorious jewel thief and his accomplices. The trail leads to the outskirts of the Hardys' home town and to a weirdly guarded mansion on the old Perth estate. With their chubby, ever-hungry friend Chet Morton, Frank and Joe tackle another mystery -- one which has baffled the town of Bayport for many...

Triggered by the disappearance of a brilliant young professor, this mystery takes the Hardy boys first to Kenworthy College, where they find a puzzling message on an examination paper. But then their pal Chet Morton, with his new metal detector, and buddy Biff Hooper, turn up a clue that sends the young detectives on an exciting search in another direction -- to the Honeycomb Caves, on the seacoast. A hot-tempered hermit who considers the caves his...