The Art of Personal Evangelism by Will McRaney, Jr. is a really good book on evangelism. He gives great insight into God’s involvement, our involvement, the essentials of the gospel, how to communicate the gospel to those inside and outside your context, coversation tips, and how to remove barriers in evangelism. I highly recommend this book. I think it is a very balanced work on evangelism. It has a good Biblical basis as well presents many practical ideas.