(From the publisher):
Shortly after his arrival in the United States, a Japanese business tycoon mysteriously disappears. Then a valuable samurai sword, said to have belonged to the missing tycoon's family for generations, is stolen from an auction gallery in New York. Danger confronts them constantly as the Hardy Boys search for the solution to the puzzle.
Original title: Mystery of the Samurai Sword
Genre: Fiction→ Crime and Mystery→ Detective Story and Detectives
Fiction→ Children & Young Adult→ Mystery
Fiction→ Children & Young Adult→ Suspense/Thriller