|Evangelism After Christendom: The Theology And Practice Of Christian Witness||
Still the best single book on evangelism.
|The Logic of Evangelism (80)||
An oldie but a goodie.
|The Ethics of Evangelism||
A bit stodgy in places but addresses an important issue.
|Worship and Mission After Christendom||
Deals with more than just evangelism but some helpful insights.