Okay, again, when a friend strongly suggests a book, then hands you a copy of the book, then recommends another book about said book, you need to read both the original book, and the follow up book. Really need to read them.
Which is what I did with this book, when Moazam handed me a copy. He handed me HIS copy, which is also saying something (mostly that I needed to return it, but let's go with saying something).
Where Kim was a work of fiction based upon stories, incidents, and the world Kipling knew, The Quest for Kim is the author's journey of discovering what, if any, of that world still exists.
I enjoyed reading the book, learning more of the history of the area, and learning about what still exists and what was, as far as the author or anyone else can tell, pure Kipling fiction.
If Kim fascinates you in any way, I recommend this book as follow up reading.