BILL WOLVERTON, Glen Canyon park ranger, and DAVE PACHECO, founder of Utah Backcountry Volunteers, will present a slide show about their monumental effort to free the Escalante River of invasive plant species, thus protecting its desolate beauty. It will be held at Ken Sanders Rare Books, Wednesday, 7 p.m., 268 S. 200 East.

CHARLES LARSON, author of "Destroying Angel," will sign copies of his book, Thursday, 7 p.m., Ken Sanders Rare Books, 268 S. 200 East.

E-mail: [email protected]