Christoper Wills is Professor Emeritus at the University of California San Diego. Wills was the first to generate an enzyme with changed function through artificial selection, and to show the nature of the genetic change and the nature of the functional change.
Chris Sorensen is a veteran audiobook narrator with over 160 titles to his name. He has received three AudioFile Earphones Awards, and his recording of Sent by Margaret Peterson Haddix was selected as one of the Best Audiobooks of 2010 by AudioFile magazine. He is a member of SAG-AFTRA and the APA.