Principia Qualia is a formal framework for understanding the problem of consciousness. In particular, it covers: (1) What sorts of tasks are necessary and sufficient for 'solving' consciousness; (2) What it means for our language about qualia to 'carve reality at the joints'; (3) A proposed solution to the mystery of valence, or why some things feel better than others. In aggregate, Principia Qualia constitutes a prospective blueprint for a new science of consciousness.