"Marks of the Messenger: Knowing, Living and Speaking the Gospel" by J. Mack Stiles is a trade paperback book published by InterVarsity Press in 2010. This book focuses on Christian Ministry and Evangelism, offering insights on how to effectively communicate and live out the gospel. With 128 pages, it provides valuable guidance for those looking to deepen their understanding and practice of sharing the message of God with others. Written in English, this book is a valuable resource for individuals seeking to enhance their skills as messengers of the gospel.