John David PettyJohn David Petty is a retired analytical chemist/inventor; founder and previous owner of Ionode Pty Ltd, a manufacturer of electrochemical sensors. He is the holder of six US patents with counterparts in other countries and has a number of papers in leading analytical chemistry journals relating to his inventions, co-authored with academic collaborators and industrial sponsors. He is widely read, and his work has been influenced by many authors. John has no previously published novels. Read More Read Less