Harlow Smith thought she had finally achieved the quiet life she wanted-a little bookstore on Cape Cod, an apartment in her grandpa's house, a more or less happily single life-when the biggest secret from her past walked into town and changed everything. A kid walks into your bookstore and says to you, Guess what? I'm your son. The one you put up for adoption seventeen years ago. The one you never told anyone about. Surprise! His name is Matthew Walker,...