topics: |  children | picture-book | zoology | puzzle

 
(cover image from http://www.mike-wilks.com/cover-ultimateno.html)

    Finely sketched drawings of impalas and toucans and ibexes - 353 pairs
    of exotic animals - are jumbled up on the large lively pages.  The
    reader's challenge is first, to detect every animal appearing on each
    page (dense descriptions of each animal follows).  However, there is
    one animal which is unpaired, and the grand challenge of this
    eye-bending puzzle is to identify this solitary creature.