Mountbatten: The Official Biography
I would say the target audience for Mountbatten: The Official Biography is people graduating in history or those, like me, passionate about it.
It’s an impossibly long book, with big pages and a small font, covering so many details of his life. And because it weighs a lot, I wouldn’t always bring it with me on my commute to the office. Long story short, it took me almost one year to finish.

That said, it was an interesting read for a few reasons. Firstly, I learned a lot about Mountbatten and English history, and when I finally arrived at the chapter about India, it was like watching the same movie from a different angle.
I could even remember some passages of Freedom at Midnight when Gandhi met with Mountbatten, and I could picture the scene in my mind as if it were filmed with a 360° camera.