In BJ Lamberti's fourth installment of her juvenile historical fiction series, Nelson Paige under the Turquoise Sky, Nelson, his father, and their dog, Ivy, journey to the arid lands of Arizona to visit the cliff dwellings of Mesa Verde and Canyon de Chelly. They find themselves unaccustomed to the intense heat, strange landscape, and unending sky of the Southwest, but they are excited to see the unique homes of the Anasazi Indians. But when they reach the cave dwellings nestled in the cliffs, something amazing begins to happen. Nelson's Kachina doll, a charm of the Hopi people who are descendants of the Anasazi, begins to exhibit magical powers. Nelson is taken backward in time to the era of the cliff dwellers, where he learns the culture and day-to-day activities of Mustard Seed, Big Turtle, and Little Turtle, Anasazi Indians. But will he ever find his way back home? Find out in Nelson Paige under the Turquoise Sky.