A would-be killer is drawing Anna Pigeon deep into the darkness-and closer to hell than she's ever gone before.

"Anna Pigeon, the intrepid National Park Service ranger in Nevada Barr's superb wilderness mysteries, has had some perilous experiences in the five novels that preceded Blind Descent, but none compares with this thrilling subterranean adventure in the underground caverns of Lechuguilla, 'a monster man-eating cave' in New Mexico's Carlsbad Caverns. When a fellow ranger is injured in a caving accident, Anna chokes back the willies of claustrophobia and joins the rescue team. Burrowing 800 feet below ground, she negotiates airless tunnells, gaping pits, vaulting caverns and silently flowing rivers, each hazard with a daunting name like Razor Blade Run or the Wormhole. At the end of the dangerous descent, she reaches her friend and hears her say, 'It wasn't an accident.' A would-be killer is drawing Anna Pigeon deep into the darkness-and closer to hell than she's ever gone before.

• adventuremodern mysteries