Preaching is the art of proclaiming the gospel. Preaching can happen in a formal setting, where someone stands in front of a group of people and exposits the word of God. Preaching can also happen informally, in a Bible study or life group, or one on one sharing the gospel with someone. Below are books that unpack why God uses preaching and how to do it: 

Books 

Preaching - Timothy Keller 

"Most Christians—including pastors—struggle to talk about their faith in a way that applies the power of the Christian gospel to change people’s lives. Timothy Keller is known for his insightful, down-to-earth sermons and talks that help people understand themselves, encounter Jesus, and apply the Bible to their lives. In this accessible guide for pastors and laypeople alike, Keller helps readers learn to present the Christian message of grace in a more engaging, passionate, and compassionate way." 

https://www.amazon.ca/Preaching-Communicating-Faith-Age-Skepticism/dp/0143108719/ref=sr_1_1?dchild=1&keywords=timothy+keller+preaching&qid=1605026237&sr=8-1

The Supremacy of God in Preaching - John Piper

"Newly revised and expanded, this classic resource is an essential guide for pastors seeking a biblical standard for preaching."

https://www.amazon.ca/Supremacy-God-Preaching-John-Piper/dp/0801017084/ref=sr_1_1?crid=OLBS4XDRIPV4&dchild=1&keywords=the+supremacy+of+god+in+preaching&qid=1605026301&sprefix=the+supremacy+of+go%2Caps%2C222&sr=8-1

The Glory of Preaching - Darrell W. Johnson 

"In these pages you will find a vision of preaching that is both illuminating and inspiring. Drawing from biblical and theological resources as well as years in the pulpit, Darrell Johnson takes us far beyond the mere mechanics of delivering sermons. He dynamically unpacks the link between the human task of speaking to a congregation and the real, gracious action and presence of the living Christ in and through our proclamation."

https://www.amazon.ca/Glory-Preaching-Participating-Transformation-World-ebook/dp/B002YIHY82/ref=sr_1_1?dchild=1&keywords=the+glory+of+preaching&qid=1605026414&sr=8-1

Preaching - Jason C. Meyer 

"The pastor opens with a funny joke, strings together a series of disconnected Bible verses and clever anecdotes, and then closes with an inspirational quote. But is this the kind of preaching that most glorifies God, honors his Word, and edifies his people?

In Preaching: A Biblical Theology, pastor Jason Meyer examines the biblical precedent for preaching in both the Old and New Testaments and offers practical guidance related to the what, how, and why of expository preaching for today."

https://www.amazon.ca/Preaching-Biblical-Theology-Jason-Meyer-ebook/dp/B00FW1FU5W/ref=sr_1_1?dchild=1&keywords=preaching+jason+meyer&qid=1605026465&sr=8-1

Preaching the Whole Bible as Christian Scripture - Graeme Goldsworthy 

"While strong, gospel-centered preaching abounds, many Christian pastors and lay preachers find it difficult to preach meaningfully from the Old Testament. This practical handbook offers help. Graeme Goldsworthy teaches the basics of preaching the whole Bible in a consistently Christ-centered way."

https://www.amazon.ca/Preaching-Whole-Bible-Christian-Scripture/dp/0802847307/ref=sr_1_1?dchild=1&keywords=preaching+the+whole+bible+as+christian+scripture&qid=1605026539&sr=8-1

Preaching and Preachers - D. Martyn Lloyd-Jones

"Based on a series of lectures originally given by Lloyd-Jones to the students of Westminster Theological Seminary in the spring of 1969, this collection of essays on the essence of powerful preaching has become a modern classic. Lloyd-Jones defends the primacy of preaching, showing that there is no substitute, and he challenges preachers to take their calling seriously: "The most urgent need in the Christian Church today is true preaching." He also provides practical direction on the task of preparing a sermon, sharing insights on the shape and form of a message as well as covering such topics as the use of humor, giving invitations in a message and the preacher’s relationship to the congregation."

https://www.amazon.ca/Preaching-Preachers-D-Martyn-Lloyd-Jones/dp/0310331293/ref=sr_1_1?dchild=1&keywords=preaching+and+preachers&qid=1605026598&sr=8-1