The Short Wave Mystery (The Hardy Boys)
Publisher: HarperCollins Publishers
Published: June 14, 1990
Number of pages: 160
ISBN-13: 9780006936664
First sentence: DIDAHDIT ... dahdahdididit ... didididahdah ... dahdidahdit ... Frank Hardy's fingers deftly pounded out the CW-key sign-off: "R 73 C U AGN AR WB2EKA DE WB2XEJ SK.