Feels like thoroughly researched work yet doesn't exactly succeed in demystifying Tesla all that much honestly.
Cheney spends too much time in giving minute and often technical details that have little to no value for a casual reader who isn't all that interested in hearing about various technical and financial aspects and considerations that obviously went into his work.
Not a whole lot is attempted to argue about Tesla's inner life and about his aspirations that weren't related to his immediate work as an engineer/inventor. For Tesla was clearly a man who was intrigued about life in general - and seemingly gifted at or at least knowledgeable about many things in life indeed.
I believe Cheney did the best job she could with what material she succeeded in obtaining. Interesting read and definitely a good place to start.