Besides a lot of the classic children's books (goodnight moon and stuff) I'm looking to get some left leaning children's books. Stuff with like a pro-union/anti-capitalist/anti-fascist slant. I'm also queer so LGBTQ children's books recommendations would be welcome, I didn't have anything like that when I was growing up and I probably would have appreciated it.
I actually never heard of these before! In general, I think books with a simple and continuous story, or ones that repeat or explore a simple theme a number of times are best. Examples of the first are 'the Little Engine That Could' and 'the Giving Tree'. Examples of the later are 'I love you Stinky Face' which features a child asking their mother 'would you still love me if I was (gross thing)' and their mother telling how she would care for them, and 'The Family Book' which colorfully normalizes lots and lots of different ways families can be (big, small, straight, gay, in one house, separated by borders).
Things with no throughline like the classic readers 'See Spot Run.' stuff I have a harder time making lessons out of because there isn't enough substance to incorporate.