Look up into the starry sky on the night of the full moon and you'll see...a bird? A plane? No...a little boy!

Eight-year-old Mary Bird has discovered a secret: her four-year-old brother Billy can fly! Floating around his room is bad enough, but when he takes off out an open window, Mary's sure disaster isn't far behind. She may be right!

This whimsical, satisfying, young middle-grade fantasy by Dick King-Smith is filled with action, adventure, and lovable talking animals.