Written for readers who would like to explore the world of particles and understand the ultimate theory of the universe with minimal mathematical understanding, this book describes the building blocks of our universe and the associated theories. The book welcomes technical as well as non-technical readers to enjoy and explore the world of particles.The World of Particles provides the recipe to build our universe. It describes the contemporary efforts by the scientists to unveil Physics beyond the Standard Model. It describes the Classical Field Theory and Quantum Field Theory (QFT), which are the modern developments in Particle Physics. It builds a strong base of various field theories like Quantum Electrodynamics (QED), Quantum Chromodynamics (QCD), Quantum Flavordynamics (QFD) and Quantum Gravity. It introduces the reader with Feynman diagrams, CPT-symmetry, Higgs mechanism, String Theory, Loop Quantum Gravity and helps to build a foundation to understand the unification of forces and the ultimate theory of the universe i.e. the Theory of Everything.