Children's author Jackie Reynolds shows her books Bee Bee's Circus at the Counting Fair and Number Fun Activity Book during the BookExpo 2017 in New York, the United States, on June 2, 2017. BookExpo, North America's largest gathering of book industry professionals, was held from May 31 to June 2 this year with the participation of about 600 exhibitors from across the world. [Photo/Xinhua]