Franklin W. Dixon

The Viking Symbol Mystery is Volume 42 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. This book was written for the Stratemeyer Syndicate by Alistair M. Hunter in 1963.

The Yellow Feather Mystery is Volume 33 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. This book was written for the Stratemeyer Syndicate by William Dougherty in 1954. Between 1959 and 1973 the first 38 volumes of this series were systematically revised as part of a project directed …