‘How Google Works,’ by Eric Schmidt and Jonathan Rosenberg
nytimes.com
nytimes.com
If you want to read about the war between Google & Microsoft, I'd suggest this one:
http://www.amazon.ca/Digital-Wars-Google-Microsoft-Internet/...
But I think the NYTimes review at the end imparts its own bias over the Gundotra story. I don't have any information but speculation, but I don't think either Gundotra or Marissa Mayer left because of 'failure', I think they simply had risen as far as they could and had no internal political opportunity for advancement. At one point, Gundotra was apparently in the running to be Microsoft's CEO (Gundotra was an ex-MS VP), and with Sundar taking over everything, Vic may have just decided to do other things.
Besides, Google Plus didn't fail, no matter how often this is repeated. It failed only if you assume the goal was to beat Facebook's news feed. However, if you consider the other things it does, it achieved a lot: Unified login, G+ now has 34% of logins across mobile and the web compared to Facebook connect at 46%. G+ photos became Google's photo hosting service. Even the G+ "stream" has hundreds of millions of active users posting. It's nothing compared to Facebook, but if it is not #2, it is #3, and who wouldn't want a business with a few hundred million people posting to it every day?
Google doesn't fire people for trying something bold and then failing, especially not execs. If Gundotra was "let go", it wasn't because G+ wasn't a roaring success.
I think Google has largely succeeded in doing that.