That group also had collective hallucinations — several times they believed they saw the devil's fleet in the bays of Spitsbergen, come to rescue them. (newscientist.com)
Remember this»80s comedy that questioned whether the Civil Rights Movement was just a collective hallucination? (lwlies.com)
I haven't read the book so can't comment on whether this placement is intentional or ironic, but it does tee up a discussion about the «collective hallucination» of Macmillan's pricing. (platformonomics.com)