The "in 24 hours" part is of course just book title clickbait. I read Sams' C++ book and the 24 hours figure is making lots of assumptions such as general famil

The "in 24 hours" part is of course just book title clickbait. I read Sams' C++ book and the 24 hours figure is making lots of assumptions such as general familiarity with programming, spending >10 times more time doing exercises and understanding the material and so on. And after all this, you will still just be a beginner since you will have no actual experience. It naturally also leaves out lots of material that isn't judged necessary to fit into the 24 hour time frame (though this may not be the case for the C book since the language is so much smaller). As for this particular link, all image links in the text seem to be broken, and a pdf of the book can be found elsewhere.