Agnes Pflumm and the Secret of the Seven

This young adult ocean adventure novel is unlike any you'll ever read. Ancient pictographs and urgent warnings from an extinct civilization leap from its pages. The future of the ocean planet is at stake, and seven primitive pictures hold the secret for its survival. A terrible, unspeakably EVIL IT is on the verge of taking the ocean into inescapable ruin. Even IF Agnes Pflumm discovers the Secret of the Seven, it will not be enough unless....