So, it depends on your e-reading setup (and this is what the entire ebook ecosystem suffers from…). Because of Amazon Kindle’s stranglehold on the market, very few standards are in place so no one can/does build something reliable AND pleasant to use (too much investment for too much risk).
The way Calibre CAN and (for me) DOES integrate with one’s PKM (Obsidian or otherwise) is that as a by-product of managing your ebooks (etc) AND your in-situ (on ebook reader) annotations, you can create context in Obsidian. e.g.: autogenerated reference notes, complete with any annotations you make on your Kindle/Kobo/etc e-reader.
The problem is, the way to do this with Calibre involves using plugins and some of your own code and the way Calibre provides database access to plugins makes it a PITA do develop any kind of reliable “one click install and use” solution.
That’s a lot of blahblah. Let me show you what I mean. I have not integrated this with Obsidian yet (and that is why I am here today), but I have built for myself a hack which exports my Calibre data into nicely assembled, contextualized reference materials in the form of a website.
For example, here is the “reference card” webpage for the book I just finished reading this morning: L / B / "Medieval Ethiopian Kingship, Craft, and Diplomacy With Latin Europe" - Verena Krebs It includes relevant metadata of the book, as well as my annotations (highlights and in-situ notes).
Now, I have some general thoughts/notes I want to add, which are not annotations (remember, annotations are notes in situ of the text: they are contextually connected to some passage, either as a highlighted quote, or a note attached to a span of or a point in a text). I might also want to write a “review” for publishing somewhere. For this I would want to write a note/post in Obsidian, and relate it to this “reference card”
That is where I am now. How do I generate a “reference card” from Calibre into my Vault. Fairly easy with a bit of code added to my existing system… but there is no way for me to share that with anyone. :\