Sam Shepard, the playwright, began his relationship with Johnny Dark when he married Dark's step-daughter. Close in age, the two men quickly developed a strong friendship based on their shared interests in writing, the creative process, the spiritual teachings of George Gurdjieff, the writing of Jack Kerouac, and their extended family. Their families lived together for a few years in California before Shepard met Jessica Lange and moved away. (His son, Jesse, stayed in California and was partly raised by Dark and his wife.) There are photographs and some transcriptions of recorded conversations from their time together, one of which occurred when the two were stoned and trying to develop an idea for a play called "The Two Prospectors," which gives the book its title. Most of the letters come from the period after Shepard moved. Despite the different paths they traveled, the two shared a kindred spirit which is revealed with openness and candor in the letters. Shepard became an award-winning playwright, actor and director, writing mostly for the public. Dark stayed close to home and wife, was a photographer, held a series of jobs, and wrote mostly for himself. Their correspondence contemplates their common interests, their struggles with self-identity, the pleasures and frustrations of daily life (taking kids to school, feeding horses, worrying about money), discussions about writing, and, as time passed, thoughts about getting older. The letters reveal almost as much as an autobiography or memoir and, because of the in-the-moment nature of the words, there is an honesty that is often missing in retrospective writing. It's a thoroughly enjoyable look at a relationship. Recommended.