Robert E. Bell Middle School in Chappaqua, N.Y., hosted the inaugural Chappaqua Children’s Book Festival on October 6. In attendance: more than 60 authors and illustrators, and more than 3,000 visitors, for a day of readings, signings, and photo ops. Next year's event will take place on September 27, 2014; to see how the festival's debut shaped up, read on.