Life-threatening accidents keep plaguing the Landon family as they investigate the mysterious deaths of white mustangs at Zion National Park in Utah. Are all the hair-raising events just coincidental? Or is there some strange magic in the dance ritual? The answers await in the raging waters of a slick-rock canyon called The Narrows. The afterword by Lyman Hafen of the Zion Natural History Association discusses white mustangs and public lands in Utah.  (USW521, $4.99)

Mysteries in Our National Parks