Too small to be important, too different to be trusted. The New Testament's Catholic letters have suffered neglect when compared to the attention lavished upon Jesus, the Gospels, and Paul. Jude and 2 Peter, especially, have been ignored. Jörg Frey remedies this dearth with this full-scale commentary on Jude and 2 Peter. Frey's meticulous, sustained verse-by-verse interpretation highlights the theological achievements of the two canonical writings without sidestepping any of the open historical and literary questions plaguing these two pseudepigraphal letters. The Letter of Jude and the Second Letter of Peter investigates the historical location of the two writings, the literary context, the shape of their arguments, and the profile of the respective opponents that are the central concern of each epistle. The analysis also explores Jude and 2 Peter's use of biblical, Second Temple Jewish, and apocalyptic traditions, the long-recognized interrelation between the two letters, and the difficult text-critical issues that haunt both. Frey's careful interpretation points to the theological work each letter performs. Jude takes part in a critical debate within the Pauline and post-Pauline communities, while 2 Peter becomes a testimony to the theological discussions of the second century. Far from insignificant or irrelevant, the epistles provide invaluable insight into the growth and consolidation of early Christian tradition. With this groundbreaking commentary, Frey rightly draws our attention back to these texts' important role within the canon and early Christianity.