Adventure at Black Rock Cave Author:Patricia Lauber "Don't go there atgain!" Chris's father warned. "There's something very strange going on at Black Rock Island." — Chris and Addie are sure of that. For they have seen two strange en - the tall one with the horrible grin, and the short one with the black, glittering eyes. — Who are these two men? What are they trying to hide? — Chris and Addie ar... more »e determined to solve the puzzling secret of Black Rock Cave.« less