What got me into all this shit in the first place (besides trying to grow some psilocybes) is a book called "Teaming With Microbes," I don't remember if I ever even finished it but it got me into the whole idea of the soil food web, which got me deep into the fungal symbiosis shit. But if I remember correctly it's a really broad overview aimed at non-scientist gardeners, so it's a good starting point, but some of the scientific detail when they try to explain stuff struck me as off.

For getting more into the soil science, I sat in on a bunch of lectures at UC Davis with Kate Scow, it looks like you can find her intro to soil science lectures here: https://video.ucdavis.edu/tag/tagid/ssc%20100 (Honestly I think the whole course was interesting, but she's the one that covers the soil biology stuff and the other lecturer is covering more the physics/chemistry stuff. Not sure which lectures exactly are the ones about the biology, but it's probably more towards the end of the course.) Her lab does a lot of interesting soil biology shit, though it's more focused on bacteria than fungi.

David Arora has a lot of good stuff on fungal ID, and there's also a paper he wrote floating around somewhere on how cultural context defines what fungi are "poisonous," with a focus on Amanita muscaria and how there are some groups (I don't remember exactly who, somewhere broadly in the "Russia" area) that see it as edible but with detoxification steps, and other groups (i.e. most western sources) label it straight up poison.