I have tried using Anki to capture my knowledge, but it's not easy to stick to it regularly, and it may even be an overkill. Two of the reading projects that I wish to complete are Campbell's "Biology" and Myers' "Psychology". These are not difficult books, but tax the memory quite heavily. I have covered significant chunks of both books earlier, only to give up in the middle and move on to the next shiny thing. Next year I wish to resume at least one of them and cover them systematically with the help of Anki until I have truly mastered the content. I don't think you can undertake reading 100 books like these if your intention is to truly imbibe the content and make it available to you in an active form.
Also, some books contain not just information, but skills. Mathematics and programming are more like swimming or riding a bicycle rather than studying History - you are learning to do stuff, not just absorb data. Readings like these where there is significant amount of doing in addition to the reading itself will also be slower than what the post mentions.