I use a #finished Date column.
In addition:
a 2000 date means abandoned
a 1999 date means I
epubsplit (the PI) this into individual books (as needed to fill gaps in my collection. )
2014 dates are mostly when I built my Library documenting my paper library (and did not know WHEN I really finished. many went back to the 70's)
Blank is my out'ta control TBR pile
