Book excerpt: This volume provides comprehensive information on how mapping an individual's epigenome can be medically relevant and holds the potential to improve preventive medicine and precision therapeutics at an early-stage (prior to disease onset). In order to advance clinical adoption of the recently developed epigenetic approaches, it is necessary for translational scientists, clinicians, and students to gain a better understanding about epigenetic mechanisms that are associated with a particular disorder; and to be able to effectively identify biomarkers that can be applied in drug development and for better diagnosis and prognosis of diseases. Prognostic Epigenetics is the most-inclusive volume to-date specifically dedicated to epigenetic markers that have been developed for prognosis of diseases, recent advances in this field, the clinical implementation of this research, and the future outlook.