So there is a course with no textbook or any information on it other than lecture slides. Thankfully, they are quite extensive and have a text search within pdf files. I quickly dropped a "pdfunite *.pdf merged.pdf" in the terminal and saw that the output has exactly 1769 slides in it, weighing in at almost 2 Gb. Ctrl+f takes a few seconds to parse this, even with zathura. I hope this is the last time I face such monstrosity.