Hank Janson - Hell's Angels

First published as "Late Night Revel" by Roberts & Vinter in 1961. This re-titled (and re-written) edition published by Gold Star ( IL7-16) in 1964. Stephen D. Frances had stopped writing the Hank Janson novels by late 1959, and the author of this novel is not known, even by Steve Holland in his 'Trials of Hank Janson' biography. The cover art is not credited, but has been identified as Robert Maguire.