Hi, I am involved with prison ministry. I give a small number of books to inmates each month. I am looking for a good paperback title relating to the basics of the gospel message, hopefully by a Reformed author. It must be paperback due to the jail regulations. The average inmate doesn't know words related to salvation, so the book would need to include those terms. If anyone has an idea on such books on the gospel message, it would be appreciated. I am only one of a dozen or so chaplain aides. Sometimes I don't see the same person for a few months, even if they remain in the jail, so I leverage from books like this. I like Greg Gilbert's book What is the Gospel? and I use his tracts, but unfortunately the book is a hardback and I cannot give those to prisoners. Regards.