My favorite custom chart that I have made so far is my "book source" chart. I went through all my Read books and added tags for where the book was from when I read it.

However, if I ever re-read books in the same edition, my data will become incorrect.

Scenario:
I buy a new book and tag it "from-store". I read it this year and love it. In two years, I read that same edition again. I'm in a pickle... I need to either

• have an erroneous "from-store" in my 2025 data
• change the tag to "from-shelf" to be accurate in 2025 which would make 2023 inaccurate
• pretend I'm reading a different edition even though it's the same one so that I can tag it differently