This volume gathers contributions on modelling, analytical, numerical, and computational aspects of structured population dynamics and delay or functional equations in general, giving rise to infinite-dimensional dynamical systems. Starting from the basics, the most recent advances are discussed relying on functional analysis and semigroup theory, aiming at stability and bifurcation analysis also with the help of computational tools developed from advanced numerical analysis. The book serves as a useful tool for graduate students and researchers in the fields of structured population dynamics and time delay systems, with an interdisciplinary approach ranging from the abstract (theory) to the concrete (implementation).