Keep notes on the things i really want to keep, some details and random facts that happen to trigger my memory, and a general sense of the work with most of the rest of the details faded away. Also, you know, entertainment.

No I don’t have eidetic or whatever the version of that is for audio or text. Closer to it when I was younger than I am now. I have a feeling this is something you can train with effort but not exactly sure what that effort is or if I have the motivation to try it.

To remember the most out of reading you have to engage with the material. Keep notes while reading or after, try to summarize what you have read after each session of reading or at the end of each chapter or each day. Ask questions about the material. Physically write these notes and questions down, ideally with actual pens and paper. Additionally engage with other people about what you have read vocally. Reading, writing, and speech engage different but connected pieces of your brain. Engaging with material in multiple modes reinforces memory from multiple directions as does the practice of summarizing, questioning, and discussing. Gets you into somewhat subconscious habits of paying attention to material differently.

But also, not everything is worth remembering. If I need a recording of the material i already have it on paper or an audio file, it doesn’t have to be accessible to my consciousness from my own memory when it’s just right there easily found.