Well... He is also written some horrible fiction novels, so the guys is not perfect.
Personally, I enjoyed them a lot and I am actually a bit bummed that he stopped publishing new ones...
Granted, I probably would not have read them had I not recognised his name on the cover (there is too much cookie-cutter stuff out there). But I did not regret buying them and I remember being impressed by the fact that this guy wrote Syinternals AND engaging fiction...
My impression from the first book was that the author has a very back and white view of the world. That could very well also affect his day job
https://www.youtube.com/watch?v=mvaUwagX_uU
For a light-hearted take.