Bookyboi rated The Skyfire puzzle: 4 stars

The Skyfire puzzle by Franklin W. Dixon (The Hardy boys mystery stories -- 83)
When an important space mission is sabotaged at Cape Canaveral, the Hardy boys are called in to investigate.
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When an important space mission is sabotaged at Cape Canaveral, the Hardy boys are called in to investigate.
Frank and Joe must rescue a cyclist who is competing in a cross-country race on the famous Silver Star bicycle.
A painting is stolen, and the Hardy Boys are suspects. Determined to find the artwork, the young detectives fly to …
First valuable antique weather vanes are stolen in Pennsylvania Dutch Country and Frank and Joe are hired to catch the …
Chet Morton's cousin, Vern, is on his way to California to find a rare and valuable coin mysteriously missing from …
Franklin W. Dixon: The outlaw's silver (1983, Armada)
The Hardy Boys are given clues which send them in search of the treasure hidden by the Outlaw of the …
The Submarine Caper (later retitled Deadly Chase) is the 68th title of the Hardy Boys Mystery Stories, written by Franklin …
When five Egyptian statuettes are stolen from a museum, the Hardy Boys travel to exotic Egypt. En route, the boys …
Franklin W. Dixon: The Four-Headed Dragon (Paperback, 1981, Minstrel)
The Hardy boys investigate a link between the kidnapping of their father's assistant and his investigation of the Alaskan pipeline.
Valuable antique weathervanes are being stolen in the Pennsylvania Dutch country. A Navy employee removes a top secret document from …
Franklin W. Dixon: Infinity Clue (The Hardy Boys #70) (Paperback, 1989, Aladdin)
The Hardy Boys solve mysteries related to a gang of terrorists and a stolen diamond.
During their father's investigation of a ruthless gang of terrorists, two young detectives face several adversaries.
Franklin W. Dixon: Footprints under the Window (1933, Grosset & Dunlap)
Footprints Under the Window is Volume 12 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. …
The search for missing gold takes the Hardy boys to the Yucatán Peninsula where they uncover a second mystery.
A novel.