David GriffithsDavid Griffiths is an Agile coach and software developer. He began programming at age 12 when he saw a documentary on the work of Seymour Papert, and when he was 15, he wrote an implementation of Papert's computer language LOGO. Before writing Hea First Kotlin, David wrote various other Head First books, including Head First Android Development, and created The Agile Sketchpad video course with Dawn. Read More Read Less