I'm reading Kit Heyam's Before We Were Trans.
So far I'd say this author knows their stuff and they're putting it in a way that can crack even my binary-gendered skull.
While I've always respected the non-binary folk in my life, I can't say I've understood their experiences, just like many cis folk would struggle to understand mine as a trans man. This gender stuff can be tricky after all, so cheers to Kit Heyam for laying out the history for us!