مجموعه مجموعه قصه های هاردی بویز ، کتاب 7 : راز غار ها

درباره‌ی این کتاب:

The Secret of the Caves is Volume 7 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. This book was written for the Stratemeyer Syndicate by Leslie McFarlane in 1929.