Synopsis "the secret of the tarascan ruins (in English)"
In this third book in the Palo Alto Adventure series, Carlos discovers the secret of the underground river with a dangerous trip inside the waterfall tunnel. Elena and Rafael's Great-aunt Elena tells them about a family secret that has been hidden for over 60 years and that would have further united Juanita's family with the Palmas, owners of the historical Hacienda Palo Alto. Gertrudes, the old family cook, tells them of her adventures during the Mexican Revolution, including facing a firing squad! While the TV Company is filming them again "discovering" the treasure cavern, Leora, Juanita, Luisito, Pedro and Rafael make another discovery that shakes the archeological world.Juanita watches her cousin Manuel riding Lucifer and winning a berth on the Mexican Olympic show jumping team where his brother Rogelio and Azar already had a secure place. She and her cousins enjoy a grand ball at the Jockey Club and the next day disaster strikes. A renowned archeologist arrives from the El Paso/Ciudad Juàrez border to supervise their find and his children; Nicolas and Mariana, join the Palo Alto group. A second disaster strikes and a very surprising turn of events uncovers the ancient mystery between the two families.En Ã(c)ste tercer libro de la serie de Aventuras Palo Alto, Carlos descubre el secreto del rÃ-o subterràneo en un viaje peligroso dentro del tà nel de la cascada. La tÃ-a abuela de Rafael y Elena les cuenta un secreto familiar que ha sido guardado durante màs de 60 años y hubiera unido màs a la familia de Juanita con los Palma, dueños de la histÃ3rica Hacienda Palo Alto. Gertrudis, la vieja cocinera de la familia, les cuenta de sus aventuras durante la RevoluciÃ3n,  incluyendo cuando se enfrentÃ3 a un pelotÃ3n de fusilamiento! Mientras que la compañÃ-a de televisiÃ3n està filmàndolos otra vez "descubriendo" la caverna del tesoro, Leora, Juanita, Luisito, Pedro y Rafael hacen otro descubrimiento que sacude al mundo arqueolÃ3gico. Juanita observa a su primo Manuel, montando
