Maxwell Laws. Electromagnetic (EM) materials. EM waves in one dimension. Linear and nonlinear metasurfaces. EM power and stability of active structures. EM waves in two dimensions. Wave guidance by two-dimensional structures. EM waves in anisotropic materials. Two-dimensional scattering of EM waves. Three-dimensional scattering of EM waves. Two-dimensional Green’s functions. Two-dimensional radiation integral. Two-dimensional scattering integral.