John Gooch's book is a concise introduction to the unification of the Italian states and the legacy of this union. Starting in 1815 at the end of the Napoleonic Wars, the book goes on to explain how, despite the causes of disunity, these Italian states shared racial, linguistic, and cultural factors, which led to their eventual political unity.
The only reason I didn’t give one star is because the conclusion of the chapters are good but the rest is a mess. He really does not explains well the part about the wars. The timeline is messed up, he keeps going back and forth referring to other pages and he didn’t make clear what happened during the civilian wars. It was very superficial.