Book excerpt: Rather than simply recycling readily available tourist information, The Baja Adventure Book makes many original contributions to the knowledge about the peninsula. You'll investigate the lava tubes on Isla San Martin; climb El Trono Blanco, Baja's magnificent 1,600-foot big wall; hike to Tinaja de Yubay; backpack in the Sierra de la Laguna and to Arroyo Grande; and explore, fish, and dive the Midriff region, the "Mexican Galapagos." You'll discover the wrecks of the great sailing ship John Elliott Thayer, the paddlewheel steamer Golden City, and the US submarine H-I -- almost-forgotten incidents in Baja's history. Exact locations are provided for Marisla Seamount, the most famous scuba diving location in the Sea of Cortez, and to many other lesser-known locations like Ben's Rock and the Islas de San Benito. Book jacket.