Borderline — Nevada Barr

Hoping a raft trip in Big Bend National Park will lift her spirits, Anna Pigeon and her husband, Paul, go to southwest Texas, where the Rio Grande is running high. The beauty of the Chihuahuan Desert and the power of the river work their magic -- until the raft is lost in the rapids and a young college student makes a grisly discovery. Caught in a strainer between two boulders -- and more dead than alive -- is a pregnant woman. And Anna soon discovers it isn't just nature that wants the woman and her baby dead...