This book and the complementary course are intended for an audience that requires a less mathematical understanding of migration and modeling than what might be required of advanced graduate students and researchers in the field. In the author's mind, this includes geophysicists and geologists who desire a fundamental principles understanding of these topics as well as a practical perspective as to where and how they may be applied for exploration advantage. We hope that, in spite of this objective, you come away with a much broader understanding of both modeling and migration as well as their application in the development and estimation of the Earth model.