Adopting a unified mathematical framework, this textbook gives a comprehensive derivation of the rules of continuum physics, describing how the macroscopic response of matter emerges from the underlying discrete molecular dynamics. Covered topics include elasticity and elastodynamics, electromagnetics, fluid dynamics, diffusive transport in fluids, capillary physics and thermodynamics. By also presenting mathematical methods for solving boundary-value problems across this breadth of topics, readers develop understanding and intuition that can be applied to many important real-world problems within the physical sciences and engineering. A wide range of guided exercises are included, with accompanying answers, allowing readers to develop confidence in using the tools they have learned. This book requires an understanding of linear algebra and vector calculus and will be a valuable resource for undergraduate and graduate students in physics, chemistry, engineering and geoscience.