The more excerpts I read from that Ian "Monstrous Terf/Zionist" Leslie book the more I see that he just rewrote a bunch of tumblr posts. His contextual knowledge actually seems quite shallow - he just writes in the style of "anecdote we all know + reference to much-shared photo + oft-repeated quote" - a style directly lifted from tumblr. And his apparently not knowing abt the beetles photo on RAM from that talk he did with (puke) Tom Holland is a real tell as to the limits of his knowledge. I wouldn't be surprised if most of his research is posts rather than books/primary sources (whatever his bibliography says). His only original writing seems to be some psychology and some song analysis (tho he's stolen a lot of that too eg In My Life trutherism, originally promoted by OSD.)
It all paints a picture of a grimy little opportunist deliberately queerbaiting to sell his book made up of other people's uncredited or barely-credited research. The text I've seen presents that research without sufficient rigour and puts the book in the same category as all the other sloppy, fanfic-y beatles bios. And some fans are falling all over his grotty transphobic ass bc he's "making McLennon mainstream". With friends like that, who needs enemies? There's a better, non-derivitave, non-sloppy J/P book waiting to be written by a decent person. Ian can go back into the hole he crawled out of and take his chickenshit book with him.