Honestly?

I have about 5,000 books. I just sat down with a spreadsheet and entered the particulars for every one like any librarian in existence over the last 2000 years would do. I did this over a few months with 1-8 hours of effort in a burst.

A lot of things still have no quick and automated solution.

When I'm doing accounting and financial analysis, it's still primarily a numbers grind of data entry, cross checking and analysis.