Computer Simulations of Liquids by Allen and Tildesley is good https://www.amazon.com/gp/aw/d/0198803206/ref=dp_ob_neva_mobile
Frenkel and Smit Understanding Molecular Simulation is also great, but I don’t recommend it for a beginner https://www.amazon.com/Understanding-Molecular-Simulation-Applications-Computational/dp/0122673514