1. Introduction; 2. Modern and ancient genre theory; 3. Ancient individual and collected biographies; 4. Acts as collected biography; 5. Characterisation in Acts; 6. Peter, Paul and the ending of Acts; 7. Conclusion; Appendix 1. Literary topoi in ancient Greek biographies; Appendix 2. References to biographical works in Diogenes Laertius' Lives of the Philosophers; Appendix 3. Divisions in collected biographies.