Navarro's main complaint with China is simply that they are keeping the currency artificially low to boost exports. See
https://en.wikipedia.org/wiki/Peter_Navarro
I sincerely doubt this has anything to do with selling books. Really! He is an academic. I am certain your posts here are going to do more for his selling of a book than higher unemployment and higher prices would be linked to such policies. By the way your claim is also a bit academic and not proven yet which is pretty much like any Navarro claim in a book regarding what will happen.
The fact is he is a minor player within the Trump universe simply because Trump agrees with his ideas. Navarro is not stopping anything on the policy front.
In any case, this is clearly a wait and see what develops scenario. I favor China raising the value of it's currency relative to the US dollar whether that be manipulation or not is in the eye of the beholder. No different than the Fed and short term rates.