I got the same result: all pages after the Foreword at page 4 and except a couple towards the end are blank. I tried printing to PDF, then the Save to PDF function of the FoxyTab Firefox extension; I also tried to save it a a single file using the SingleFileZ extension that saves pages and data using a compressed single file (thus no conversion to PDF) which is directly readable by Firefox. No way, always blank pages after the Foreword.
Not sure if that's a protection scheme or a bad conversion from pdf, but to me being forced to be online and use a browser to read a book kills any interest.
Repo Link: https://github.com/eborin/riscv-programming
I may be wrong. I am not able to see the content of the book. (I thought, above repo has the content.). More ever, I see copyright notice in the book. So,
it is open for reading purpose only.
Seems, reading the book on the browser is the only option, that is how I did it since many weeks.