The second book 'Skylark' in the series that began with the Newbery Medal-winning Sarah, Plain and Tall by Patricia MacLachlan.
 
My mother, Sarah, doesn't love the prairie. She tries, but she can't help remembering what she knew first.
 
Sarah came to the prairie from Maine to marry Papa. But that summer, a drought turned the land dry and brown. Fires swept across the fields and coyotes came to the well in search of water. So Sarah took Anna and Caleb back east, where they would be safe. Papa stayed behind. He would not leave his land.
 
Maine was beautiful, but Anna missed home, and Papa. And as the weeks went by, she began to wonder what would happen if the rains never came. Would she and Caleb and Sarah and Papa ever be a family again?