Few days ago Włodzimierz Bednarski, a polish scholar specializing in JW doctrine finished translating his latest book about Year 1925. For those who don't know, the "Millions" campaign was one of the biggest failed prophecies of Watchtower society. It's also one of the most forgotten ones. I for have learned about this only after reading this book in polish some time ago. I strongly recommend everyone to read it. For me it really helped me to see the cult that Watchtower is to the fullest extent for the first time.
Link: https://wtsarchive.com/pub/wb25-e_year-1925-and-millions-now-living-will-never-die