This work is to consolidate current literature on Koopman-von Neumann (KvN) Mechanics into a simple and easy to understand text. KvN Mechanics is a branch of Classical Mechanics that has been recast into the mathematical language of Quantum Physics. KvN Mechanics utilizes a Hilbert phase space with operators to calculate the expectation values of observables of interest (expectation values such as position, momentum, etc.) It is an important tool in statistical physics and guide to illuminate the mysterious relationship between Quantum and Classical Physics. A lot of important applications of KvN Mechanics have been developed in the last decades.