Mysteries In Our National Parks: Ghost HorsesBy: Alane Ferguson Series: Mysteries in Our National Parks Life threatening accidents keep plaguing the Landon family as they investigate the mysterious deaths of white mustangs at Zion National Park in Utah. Even before they get to the park, Jack Landon knows that Ethan Ingawanup spells trouble. Things start to go awry after Ethan and his sistertwo Shoshone kidsare placed in the Landons' care. The questions begin to mount after Ethan teaches Jack and