Most of the early volumes were written by Canadian Leslie McFarlane, who authored nineteen of the first twenty-five titles and co-authored volume 17 "The Secret Warning", between 1927 and 1946. Unlike many other Syndicate ghostwriters, McFarlane was regarded highly enough by the Syndicate that he was frequently given advances of $25 or $50, and during the Depression, when fees were lowered, he was paid $85 for each Hardy Boys book when other Syndicate ghostwriters were receiving only $75 for their productions. According to McFarlane's family, he despised the series and its characters.