I am beginning to think I am obsessed with fiddling with my Calibre libraries.

But in all fairness my latest (hopefully not too huge) project is all the fault of Calibre Companion. They've added a feature to indicate if a book is read and date read. So... I have added customn columns to my main Calibre library and Calibre Vault.
After some internal debate I have decided to call the date column Date First Read. I do a lot of rereading, but didn't want to make a column for date last reread (or multiple columns - I'm not quite that crazy

)
I've dug out my reading diaries which go back to 1989*. But of course most of the books I read back then were in print. But I'm going to go by date the book was first read regardless of format. I'm not sure how complete my records are so there may be plenty of guess work involved.
Eek! Wish me luck...
*ETA - oops not really. Apparently in 1991 I was more concerned about how much time I read as it only says things like started book. finished book. with no titles