Wholeheartily agree with the author's sentiments on the value of textbooks. Not because of the medium itself, but because they're (usually) accompanied by well

Wholeheartily agree with the author's sentiments on the value of textbooks. Not because of the medium itself, but because they're (usually) accompanied by well thoughtout examples and practice problems. When initially starting a dense subject such as PGM, having my hands held through the introductory material with incremental practice problems as the topic elaborated, helped me get a much more intimate grasp. Initially only reading superficially and watching lectures, I kept getting stumped trying to form a cohesive mental map of all the interleaved concepts.