When Crystal McLean asked for a book about money for her third-grade daughter, the Barnes & Noble employee just looked blankly at her. There was no such thing, she was told. So instead of pushing off financial literacy lessons for her young daughter, Crystal wrote the book she had hoped to find. “Harmoney & the Empty Piggybank: A Book about Money Budgeting Entrepreneurship and Persistence” introduces kids to handling money while helping parents facilitate conversations about financial responsibility. Crystal recently…