M31N 2008-12a in the single most important nova system in M31. With its one-year recurrence period, high-mass white dwarf, high mass accretion rate, and low ejected mass, this system is a leading Supernova Typa Ia single-degenerate progenitor candidate. Here I present results of the successful campaign to detect the predicted 2014 eruption, and those from the extensive optical, UV, and X-ray follow-up observations.