What's the tone in this book, and what is the genre or what type of book is this? This is for a school assignment and I can't figure out what they...

The Sand
Reckoner is a small book by the ancient Greekof Syracuse (c. 287 BC €“
c. 212 BC) who was a mathematician, physicist, engineer, inventor, and
astronomer. The genre to which "The Sand Reckoner" belongs would be...