The proceedings of the Workshop on Physics at the First Muon Collider and at the Front End of a Muon Collider represent a unique collection of thoughts and ideas that will enable us to build a muon collider in the near future, as they do not exist yet. There are still outstanding problems in the areas of cooling muons sufficiently to produce high enough luminosities as well as in the area of detector backgrounds caused by muon decay. The work details significant progress in all these areas, leaving us optimistic in the assumption that the construction of the first muon collider may be feasible in the next decade. Muon colliders provide a unique opportunity to explore the properties of the Higgs Boson, which can be directly produced in the S channel only at the muon collider. The muon collider will also enable the search for supersymmetric partners of ordinary particles and significantly enhance our study of the properties of the top quark and the W boson. The production of large number of muons requires a high intensity proton accelerator, the so called front end, which will permit the production of intense beams of hadrons, neutrinos, and muons.