Speak You Peace by Ronald J. Sider is a very though provoking book.
From the Back Cover
Is nonviolence irresponsible? Is peacemaking naïve?

From one of the most respected and prophetic voices in Christianity today comes Speak Your Peace. Ronald J. Sider, author of the influential Rich Christians in an Age of Hunger, plumbs Scripture, building a persuasive case that Jesus meant what he said when he commanded us to love our enemies.

With candor and logic, Sider takes on enduring questions about violence and nonviolence, showing how the contemporary church in a warring world has largely set aside Jesus’ call to love our enemies and traded its birthright in Christ for a stew of nationalism and militarism. But ignoring what Jesus said about killing is a huge theological mistake. Returning us to the inescapable call of the Son of God, Sider reminds the church of its true vocation in a world of hatred and war.

All in all I will say that this was a good read that encouraged me to go to my Bible and study deeper what Jesus taught about loving our enemies. I would recommend this book to anyone looking to further study Jesus‘s teaching on living in this world.