Steve Blank has been in the StartUp world for decades, just check his about page: http://steveblank.com/about/

And compare it to the author you're talkin about http://www.ashmaurya.com/about/ that clearly states in his page "In late 2009, I ran into into Steve Blank’s lectures on “Customer Development” from where I followed the trail to Eric Ries’ early ideas of the Lean Startup."