So a couple years ago my parents were doing some downsizing.
Mum: Take any books you want.
Me: OK. Nice bird identification book.
Mum: Take it. We never look at that.
Fast forward about a year and a half.
Mum: We used to have a really nice bird identification book. I wish I could find it. Your dad and I would love to be able to identify all these birds that we see on our walks.
Me: Umm, you gave me that book.
Mum: Oh. Can we have it back?
Fast forward to two weeks ago.
Me: I need to get a bird book so that I can figure out what birds I have at my feeder.
Mum: We have a really nice one around here that we never use.
Mum: Here you go.
By the way, it is a really good birding book. Color pictures, song identification info, habitat maps, and profile drawings for quick identification. My copy is from 1966 and sells for $65 on Amazon (crazy, there's apparently a collectors market for old bird books) but you can get a new edition for about twelve bucks...
and I will get a small commission. If you wanted a good bird book, now's your chance.