The Covenant (Abram's Daughters #1) by Beverly Lewis

The powerful family saga of four Amish sisters whose way of life and faith in God are as enduring as Lancaster's signature horse and buggy. Or so it seems...

The Plain community of Gobbler's Knob holds everything courting-age Leah Ebersol has ever desired, including handsome young Jonas Mast. But a pact with her older sister, Sadie, lured by the outside world, leaves Leah clinging to the promise of a tomorrow that might never come.