Search for (a free web-based version) and combine it with "roadmap.sh" . Download the PDF version of those sites via wkhtmltopdf . You now have a "Computer Science Unleashed" equivalent without chasing leaks.
Try to explain a concept like "Virtual Memory" to someone who isn't in tech. If you can't, go back and re-read the chapter.
: It begins with the simple question of how two computers share information. By examining the "Link Layer," readers learn about MAC addresses