Best way to learn using a chess book?

#20 Those links work for me. FireFox 89.0.2 (64-bit)
Adding the "s" would not work for me for Mr. Wall's page even outside Lichess.

so for chrome based. it works as I described. thanks for the FF behavior. Read my edit for chrome solution.
Version 91.0.4472.164 (Official Build) (64-bit)

There is an Android app called chess book study which let's you split screen with a pdf and an analysis board. I am thinking about getting an Android tablet to use as it is too small on my phone.