The problem of the electrostatic potential is present in chemical and atomic/molecular simulations. On page 427, Pablo García-Risueño et al. present an analysis of different methods to calculate the classical electrostatic Hartree potential created by charge distributions. This work may enable more accurate and efficient simulations, helping scientists to tackle many new systems. The cover illustrates the performance competition of Poisson solvers. The image is courtesy of Forschungzentrum Jülich, and provided by Pablo García-Risueño, Joseba Alberdi-Rodriguez, and Jesús Pérez-Amor. The velocimeter creative commons is by Anderson Mancini.