What makes this book different from others about Leonardo? Catherine takes a topical look at da Vinci's life - covering not just his artistic accomplishments, but also his mathematics work, his engineering work, his inventions, and much more.
Most books on Da Vinci for kids have very little information, and those geared for adults generally have too much. This book is complete enough to give a good picture of who Leonardo was and what he accomplished, without overwhelming readers; interesting for those who may know nothing about him and for those who know lots about him. Either way you are likely to learn something new!
You may also be interested in Catherine's historical fiction series - The Life and Travels of Da Vinci - it starts with Leonardo the Florentine (covering his years as an apprentice), Leonardo: Masterpieces in Milan (when he works on the Last Supper) and Leonardo: To Mantua and Beyond (when he leaves Milan and heads to Mantua and Venice).