You’re welcome, @Jens_Ober - I have an ever-growing collection of field guides, general nature books and subject specific books that I use for identification and just to learn about the things I’m taking pictures of. I love learning new things and continue to be surprised by all the things nature does and is. I think I posted about my collection at some point here on NPN in the resources section, but it probably needs updating with the last few books I bought.