Seems the orphan rule only applies to the UK and book is published in the US.
Can't really be fucked to pursue it. The book is academic (film theory) so it's not like he's making a mint. I took it late at night at Beigel Bake in... 2007? So I have fond enough memories not to give a shit.
https://www.gov.uk/guidance/copyright-orphan-works
Seems like you've just experienced both ends of this