Humanity has long looked to the sky and marvelled at the world around us. We've wondered why the world is the way it is and whether it has to be that way. For millennia these questions were theological, transitioning to philosophical during the Enlightenment, but the discipline that now drives progress is science. We now look forward, hoping to make additional connections and create a better understanding of the ultimate laws of nature. We dream of a time when we have developed a theory of everything--a theory that answers all questions. There is so much that we don't know. This book is up front about our ignorance and spends some time dispelling some of the more popular theories. It then redirects the reader's attention to how we will actually move forward, by identifying things we don't yet understand and engaging with the experiments that will drive our comprehension. Einstein's Unfinished Dream explores the cutting-edge research of modern particle physicists that pushes us slowly towards a theory of everything. Marshalling decades of experience in distilling high-level scientific concepts, Lincoln invites readers into the mysteries of dark matter, dark energy, matter/antimatter asymmetry, quark and lepton flavor, and other phenomena that have puzzled humanity for centuries.