 He is considered to be part of a group of photographers known as the Boston School -- David Armstrong, Philip-Lorca diCorcia, Nan Goldin, Mark Morrisroe and twins Doug and Mike Starn, among others.All of them knew one another in the early 1980s and photographed their immediate circle of friends in situations that were, or appeared to be, casual or intimate.Pierson first began making his "Word Sculptures" in 1991, utilizing found objects – mismatched letters salvaged from junkyards, old movie marquees, roadside diners, Las Vegas casinos, and other forsaken enterprises.