In the Woods — Robin Stevenson

When Cameron rescues a baby abandoned in the woods, everyone says it is a miracle. A stroke of luck that he just happened to be there, riding his bike along that trail, and heard the baby's cry. But Cameron has a secret: It wasn't just luck. He was there because his twin sister Katie begged him to go. Did Katie know about the baby? Is she covering for someone? At first Cameron just wants some answers but once he knows the truth he has to decide what to do with it.

Also available in Spanish.