Working through a technical book of any substance, as opposed to just reading or skimming it, will take dozens of hours, no matter how terse or verbose the style is.
The book is supposed to be around 270 pages, so verbosity probably won't be an issue.
I am right now working through "Python Crash Course" as an intermediate Python programmer. I very quickly read through chapters 1-8 so far and did all the exercises (rather simple ones), just to make sure that I'm not missing out anything on the basics. In the last couple of chapters, I actually picked up two or three pieces of knowledge I wasn't aware of. I spent around five to ten hours on this so far. This approach sounds terribly inefficient.
However, working through a beginner's book as an intermediate Python programmer, and only getting half a dozen of really new information out of it, gives me the confidence I need at this stage. So I don't consider it as a waste, but rather as an exercise in patience and repetition.
Why am I telling you all this? Because I think people overrate the monetary costs of books.