Kump is excellent. Thanks so much for the recommendation.
I'm very lazily working my way through it, with a goal slope of one chapter per week, whereas the official programme calls for six chapters per week, iirc, and suggests far more practice than I'm doing.
Nonetheless, it's remarkable. My comfortable reading speed has tripled with no reduction in comprehension. My retention is also unchanged, which is to say, as lousy as before , but I have an expectation that the remaining exercises will continue to strengthen that.
My reading habits are in flux: I used to read while eating meals, that's harder to do if I were to use a guiding finger. So my eating-reading is shifting toward already-purchased ebooks, or to keeping up with foreign-language reading. Neither of those seems amenable to using a guiding finger anyway.
Scott Young also recommends Kump, partly as a means of rapidly assessing what parts of a book you want / need to read more carefully. That seems consistent with Kump's stress on determining the purpose for any given reading. In learning on steroids, Scott writes:
What speed reading should enable you to do is:
1. Be able to increase your comprehension at higher reading speeds.
2. Teach you when to slow down and when to speed up, so you get the most value from your reading time.
Beneficial example: a friend handed me a philosophy book and said, can you just read this while I'm on another call, because I think it's relevant to our work. I managed a quick 72 pages, capturing enough of the gist to apply it to the afternoon's discussions.
 I rely heavily on anki cards to remind me of things that I want to remember from any source, whether quotes, books, concepts, ideas, faces, etc. It's not always easy to remember to make the cards, though.