The e-books I copy pasted from the manage content tab in my Amazon account (their site shows 200 at a time, so it was 4 copy pastes). My physical book purchases were spread out over Amazon US and Amazon Germany, but about 50 in total in mayb 15 purchases, so I did those by hand too. Amazon doesn’t provide an export feature that makes sense, other than connecting your purchases to a GoodReads account and exporting a CSV there. I wanted to avoid doing that.