Have you tried any spaced-repetition tool like https://apps.ankiweb.net/ ? Since it's designed for retention of anything which can be put into it, It can work for storing content from non-fiction books/articles as well.
Have you tried any spaced-repetition tool like https://apps.ankiweb.net/ ? Since it's designed for retention of anything which can be put into it, It can work for storing content from non-fiction books/articles as well.