Grace Byler spends all of this trilogy wondering why her mother Lettie left the family and doing what she can to find her. With "Englischer" Heather's help, Grace follows clues to her mother's whereabouts, always missing Lettie by a day or two.
One of the major themes running through the three books is adoption. The reader will see the ending coming a mile away, but the twist involves who it is that does "The Telling".
While I enjoy Beverly Lewis's books, I don't think she needed a whole trilogy to tell this story.