I think the people who ultimately led to Nokias downfall worked at 1 Infinite Loop where the iPhone was developed. Prior to the iPhone, Symbian was the dominant "smartphone" OS in Europe, or at least competitive with Blackberry, but the carriers shut Nokia out of the high-end phone market in America. I think Elop's strategy was to win over the American carriers/market but the strategy backfired and accelerated the exodus to iPhone/Android in Europe while not gaining a foothold elsewhere.
Apple left the door open for one or more alternative smartphone vendors. Nokia and Blackberry dropped the ball and Google filled the gap with Android that Verizon marketed splendidly. I'm not sure if Elop's strategy could ever have worked but it certainly had no chance when both Nokia's employees and customer base resented the approach.
I have not read the book so I'm not sure if my views mesh with what was written there.