Suitable for middle-school-age readers, this book focuses on the life and accomplishments of one of the most influential mathematicians and philosophers. Using Leibnizs written works and translations as well as fictional dialogues, the book traces Leibnizs life from his early years as a young boy and student to his later work as a court historian. It explores his contributions to the world of calculus; his inventions, including the mechanical calculator; and his role as a philosopher and proponent of rational, algorithmic thinking.