00849    a2200193   4500001000700000020001800007020000900025041000800034082001000042245003500052246003000087490003500117520036900152856002400521040002500545260003700570300001700607700003100624118597  a9780448089102  qenc.  aeng  a[Fic]10aThe Hardy boys mystery stories  aWhat happened at midnight  aThe Hardy boys mystery stories  aFrank and Joe race against time to retrieve a scientist's top-secret invention before thieves get their hands on it. But the young detectives soon discover that they are involved in a mystery far greater in scope than just safeguarding the invention. When Joe is kidnapped, this incident starts Frank of on a chase that could end disastrously for him and his pals.  u000031/00003153.jpg  aBR-BrIDEAcBR-BrIDEA  aNew YorkbGrosset & Dunlapc1992  a180 p.bill.  aDixon, Franklin W.eauthor