HB is the fifth short-story in the 1984 release Nancy Drew and the Hardy Boys Super Sleuths! Volume 2 anthology, published by Wanderer Books and imprint of Simon & Schuster.
After finishing up a game of Monopoly, Chet Morton walks into the Hardy home with a note that he claims a masked man passed to him just as he entered.
Who was this masked man and what does he want with Nancy Drew? The reader will just have to find out.