Plain Truth by Jodi Picoult

Second Hand 

From the bestselling author of My Sister's Keeper comes the riveting story of a murder that shatters the picturesque calm of Amish country—and tests the heart and soul of the lawyer defending the woman at the center of the storm.

The discovery of a dead infant in an Amish barn shakes Lancaster County to its core. But the police investigation leads to a more shocking disclosure: circumstantial evidence suggests that eighteen-year-old Katie Fisher, an unmarried Amish woman believed to be the newborn's mother, took the child's life. When Ellie Hathaway, a disillusioned big-city attorney, comes to Paradise, Pennsylvania, to defend Katie, two cultures collide—and for the first time in her high-profile career, Ellie faces a system of justice very different from her own.