In What the Ladybird Heard by Julia Donaldson, is there (or is there not) a ladybird on the front and back endpapers? i.e. the whole farmyard scene that appears at the beginning and at the end of the book.
I think what has happened is that the publishers put their "find the ladybird on EVERY page" banner on for the paperback edition, not realising that children take this very VERY seriously, and that to them, the front and back endpapers in the paperback are "pages". In the HB edition it probably doesn't seem so odd.
Or perhaps there are 2 very very tiny ladybirds that we have all missed on the many many occasions we've looked. . .