9:38 Book - Workers for the Harvest Field
Covers both the principles behind full-time gospel ministry and gives examples of many different types of gospel ministry. It is aimed at those considering ministry and would be ideal for church leaders wanting to trigger these types of thoughts in congregation members. Authored by full-time gospel workers from around the country and edited by Vaughan Roberts and Tim Thornborough.
Buy from The Good Book Company
Also recommended - Passing the Baton
This is a handbook covering all aspects of running an apprenticeship scheme. Published by MTS, Australia, where apprenticeships began, the book gives good biblical motivations for running a schemes and then has very practical advice on how to run a scheme. It was written by Colin Marshall.