I buy physical tech books because I enjoy writing notes in them to keep track of concepts while reading. For example I have a copy of the excellent Multiple Vi

I buy physical tech books because I enjoy writing notes in them to keep track of concepts while reading. For example I have a copy of the excellent Multiple View Geometry in Computer Vision by Hartley and Zisserman filled with little sketches and notes I took in the margins while trying to grok the book, and it’s kinda nice to be able to thumb through the book and review concepts complete with my previous thoughts and notes. I could of course do the same on my tablet or in a separate notebook of course, but something about the space constraints and commitment of real marks on paper makes it feel more rewarding.