Part of the International Series in Mathematics Ideal for the 1-term course, A Journey into Partial Differential Equations provides a solid introduction to PDEs for the undergraduate math, engineering, or physics student. The text focuses on the classical trinity of equations including the wave, heat/diffusion, and LaPlace's equations, discussing the concepts and methodologies of each. It provides careful treatment of the separation of variables and the Fourier method, motivated by the geometrical notion of symmetries. The author places emphasis on both the qualitative and quantitative methods, as well as geometrical perspectives. With hundred of exercises and a wealth of figures, A Journey into Partial Differential Equations proves to be the model book for the PDE course.