This book was written for the Stratemeyer Syndicate by James Duncan Lawrence (who also authored the majority of the Tom Swift Jr. series) in 1960.

[1] The Hardys purchase a Chinese junk named the Hai Hau to ferry passengers to Rocky Isle and make some extra money.

Four mysterious men also are interested in the boat because of treasure hidden inside the Hai Hau.

George Ti-Ming is a private detective who helps his friend in Hong Kong find his missing ship.

The book was adapted into a 1967 television pilot of the same name (it was not picked up), scripted by Richard Murphy and directed by Larry Peerce.