Mark Kelly is a retired astronaut and US Navy Captain. His picture book <i>Mousetronaut</i>, illustrated by C.F. Payne was a #1 <i>New York Times </i>bestseller. He flew his first of four missions in 2001 aboard Space Shuttle Endeavour, the same space shuttle that he commanded on its final flight in May 2011. In 2020 he will be running to represent Arizona in the United States Senate.