It is now over 20 years since the publication of Collins's seminal work, Diakonia: Reinterpreting the Ancient Sources. His approach in that book and subsequent publications is now essential reading for anyone intending to explore the subject. This most recent collection gathers together a range of articles (both published and unpublished), many of which have previously been hard to find, making it much easier to reflect on and respond to Collins's valuable contribution to the field.