For collections that already include similar material, this book states very clearly what it is and what it hopes to be used for; it enlarges an existing discussion and turns tropes around to include everyone and everything.
In a glorious nighttime world that is the opposite of what most diurnal human children know, this book is really just an excuse to show off storytelling and see just how far the author and illustrator can take it. Not essential, but lovely.
Whether for art, science, or philosophy, this compelling book offers food for thought, and will launch discussions as well as drawing exercises among a wide range of readers.