G.O.S.P.E.L. is written by D.A. Horton, also known as the hip-hop artist Azriel.
Horton does an incredible job in this book explaining what it means to be a gospel-centered missionary. You do not have to leave the United States and fly to some third world country to be a missionary. Jesus said you are a missionary. You walk in the authority of Christ to share the gospel wherever you go. In other words, until you die, or Jesus comes back, you are a missionary.
Horton writes G.O.S.P.E.L. in a way that is understandable for someone that lives in the urban community. What is applicable here, is the fact that we as missionaries have to take into context who it is that we are trying to reach with the gospel message.
As Horton points out, you must know the language (slang, street talk, ebonics) of the culture you are trying to reach without changing yourself. You stay you and you communicate the gospel in a way that is easy for the people you are trying to reach. Don't over complicate the gospel. However, you have to know what the gospel is before you can share it with somebody else.
Horton breaks the gospel up into an acronym:
Penalty and Price
G.O.S.P.E.L. is real, uncut, heartfelt, and thought provoking. You cannot read this book and not understand the mission to which you as a Christian have been called to by Christ.
At the end of the book, Horton provides what he calls a Thebonical Glossary. If you are unfamiliar with some of the language used in the urban community, this will be of some help to you.
G.O.S.P.E.L. is one of the best evangelistic books I have read. Horton takes the message of the gospel and makes it both clear and easy to understand no matter what your culture background is.