Andreas started a trend.
There are now so many competing books on Bitcoin available on Amazon:
https://smile.amazon.com/s/ref=nb_sb_no ... ds=bitcoin
I think this really shows that our ideas are spreading.
Pablo Lema was nice enough to point this out to me.
His free book can be found here: https://smile.amazon.com/dp/B01F9NN21G?sa-no-redirect=1