Rocks in His Head by Carol Otis Hurst, pictures by James Stevenson
Based on the true story of the author's father, this book is a fantastic addition to a geology study. He loved rocks from the time he was a young boy, collecting and studying them his entire life. Every few pages the phrase "rocks in his head" repeats, to which her father always agreeably replies, "Maybe I do."
There's a little history (the rise of the automobile and the Great Depression) in addition to the geology, but most importantly is his humility and quiet perseverance. His rocks give him a steady joy, even when faced with struggles. In this end, his dedication to his passion and his never-ending quest for more knowledge earn him his dream job.
Second Daughter has been inspired to not only collect rocks after reading this book, but to search through myriads of library books to identify her rocks and label them. Now she and First Daughter have rock displays on their dressers.