The two small letters of John possess a unique charm precisely because of their brevity, their situational context, and their transparent form, which few can resist once they engage with them. Due to their limited length, they often risk being treated merely as an appendix to the larger first letter. This is different in the present commentary volume, which provides them with a distinct, more detailed, and self-contained interpretation. The introduction focuses on the authorship question and the circumstances of composition, while also addressing the complicated history of the inclusion of the 2nd and 3rd letters of John in the canon. Great attention is consistently given to the comparison with ancient letter theory and practice. Thus, the commentary incorporates impulses from the latest research. Excursions are dedicated to the presbyter, the "chosen lady" (2 John 1), the theme of hospitality, and the church leader Diotrephes. The sparse but previously neglected history of reception is exemplarily presented. Insightful aspects arise regarding the house and greeting prohibition in 2 John 10-11. Important concerns of the 2nd and 3rd letters of John include the maintenance of relationships, their jeopardy, their breakdown, and attempts at their rescue or restoration. This gives the letters, which provide glimpses into a broader exchange of messages, particular relevance in a time of heightened interest in communication processes and media. They are particularly engaging due to the warmth with which the internal relationships within the community are depicted. Evidence of this is found in the metaphorical language drawn from the realm of family and friendship. What ideally characterizes a sibling community can be discerned from this.