"The Radio Boys at Mountain Pass; Or, The Midnight Call for Assistance" by Allen Chapman is a juvenile adventure novel published in the 1920s. Part of the popular Radio Boys series by the Stratemeyer Syndicate, this installment follows young radio enthusiasts as they respond to a mysterious midnight distress call from Mountain Pass. The story combines early radio technology with thrilling adventure, capturing the excitement of wireless communication in an era when amateur radio operators were pioneering heroes of their communities. (This is an automatically generated summary.)