Every book has an owl in it. Sometimes
the owl doesn't appear
until just before the ending. Sometimes
the book will quote another book with an owl in it,
making it a "twofer." Both of these things are true for
THE BOOK OF LEGENDARY LANDS by Umberto Eco, which in its last chapter quotes Rabelais on the subject of an island inhabited by birds who "
farted like men." Rabelaisian! "Some of them were all over white as
swans, others as black as
crows, many as grey as owls, others black and white like magpies, some all red like redbirds, and others purple and white like some
pigeons."