Mathematical models, applied in computer code, underpin all of Science. Exciting and accessible examples are chosen from epidemiology, elections, rainbows, radar, money, mortgages, fractals, fluid dynamics, atmospheric physics, bayesian inference, navigation and chaos theory. All of these are in volume 1 of a new book called Science by Simulation.A Mezze of Mathematical Models is Volume 1 of Science by Simulation. It is a recipe book of mathematical models that can be enlivened by the transmutation ofequations into computer code. In this volume, the examples chosen are an eclectic mix of systems and stories rooted in common experience, rather than those normallyassociated with Physics, Chemistry or Biology in isolation. Exciting and accessible examples are chosen from epidemiology, elections, rainbows, radar, money, mortgages, fractals, fluid dynamics, atmospheric physics, bayesian inference, navigation and chaos theory. This approach will hopefully provide a tangible and readily accessible context for the development of a wide range of interconnected mathematical ideas and computing methods that underpin the practice of Science.