Share 'Books on Birds; What's Your Fav?'

I am a reader; I like to research, I enjoy reference books…especially on topics close to my heart. I don’t believe one can have too many books on a subject…but then I am book rich and money poor. LOL Okay, so I’m on a limited budget…I have a couple books on birds and know I want to enlarge my library. I think another ‘general’ field guide to birds I’m apt to see might be a good idea. While I’m...