I have a list of school related books we read. I create an xcel spreadsheet at the beginning of the year with each students “overview” for the year, it includes all the books we read for history, independent literature, and family read alouds.
I do not log the just for fun reading books though.
I like having a list because that way as the younger kids grow up I can see what we read when and it helps me remember what I want to read again. DD likes to know what is on her schedule for the year so she does not read “school reading” for “fun reading”