Having taken Tiago Forte's course on knowledge management (called Building a Second Brain) I've started highlighting interesting parts of the books I'm reading.
Rather than leave these highlights languishing within my ebook reader, I then import the highlights into a note taking app (e.g. Notion) where I can easily skim through them, highlight key points, etc.
While Notion are apparently working on an API, it's not yet as easy as it could be to automatically load this kind of data into it. So while I wait for an API and a bunch of IFTTT recipes to present themselves, I'm using some little utilities to help me get by.
So far, the list of supported ebook platforms is short!
O'Reilly provide a CSV file containing all the highlights you've made to any of the books that you read on https://learning.oreilly.com.
The oreilly-book script generates a Markdown file containing the
highlights from a specific book, that can then be imported into a note-taking
app. It was written to get highlights into Notion, but it's just generating
Markdown, so will work with any app that can import Markdown.
Run it like this:
$ ./oreilly-book "Book Title" < safari-annotations-export.csv > book.md
The "Book Title" string must match the first column in the CSV file for the book you're extracting highlights for.