This book is one of the best read I have had this year. I would strong recommend everyone to read this. The author certainly had a way with words and the story was flowing seamlessly. The pacing was neither too slow nor too fast, it felt even throughout the book. I liked how the author kept the descriptions of the summer, the wild, the flowers and the colors so vividly, I almost felt like I could feel the heat/ smell the flowers. This book gave me a lot of feels and made me teary eyed. It wasnt any specific passage or quote which made broke my heart 
 This is the story of a mad scientist's daughter. Cat, our protagonist meets Finn (a special robot / humanoid??) when she was just a little girl. Finn becomes Cat's tutor, he teaches her math and tells her stories. Cat is only child to her parents and she is home schooled for quite a number of years. Initially she assumes Finn is a robot, the author sure knows how to handle our childish view of the world. 
 Cat's mother is not thrilled of the idea of her only daughter getting close with Finn so she decides to send Cat to school so that Cat could meet people and have friends of her own age. 
 Over time, Cat grows fond of Finn and considers him human.