Miller's Matter is a novel written by American author T. Coraghessan Boyle. It tells the story of a young man named Miller who is struggling to find his place in the world. The novel follows Miller as he navigates his way through life, dealing with issues such as love, family, and identity. The crossword solution for the term MILLER'S MATTER is GRIST, which is defined as 'a source of useful material or information; a valuable resource'. In this case, it can be interpreted as Miller's experiences being a valuable resource for him to learn from and grow.