The illustrations are absolutely charming!  Hugo is a small yellow bird, living in Paris, who doesn’t like to fly.  One day he meets a new friend who wants to take him to the Eiffel Tower, but Hugo keeps making excuses to put off the adventure.  Finally that evening he confesses to a local owl that he is afraid of flying.  The owl is both understanding and helpful.  After practicing all night, Hugo is finally ready to take the leap the next day when his friend returns, and thoroughly enjoys the adventure.