@logarithmic_function As a fellow slow reader at times, I'd suggest the following:

1) Learn to recognize what text can be skipped. If you are gonna grind the text, it better be the part ur actually interested in.
2) State your reading objective. Don't just read, but read with purpose. Makes it easier to get results.
3) Try jumping through the text once just to get an overview. Skim parts that look critical. You can better figure out then what ur reading about.

@logarithmic_function kind of, but it depends on what type of textbook

do you mean the English/social sciences sort that's like 90% reading and a few "study questions" or whatever or the math/some other sciences kind that's like 40% reading 60% problems

@logarithmic_function back when I read textbooks, I found using a highlighter to color important chunks of text helped me commit them to memory, even though I never actually went back to review my highlights later.