The book explained the Bubonic Plague, and how it happened really well. The author really went in depth on how the plague affected the world, how the rats had spread the disease, and how the scientists figured out how to deal with it.
The writing style the author had used was really interesting, one thing that confused me was the time jumps. The author skipped to different times in the book. It took me a while to figure out why I kept getting lost. So I had to go back and re-read some of the parts in the book, but I eventually figured it out. If you like science and/or history this book is definitely for you. Watch out for the time jumps though.
Z.S.