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The widely read author and philosopher Peter Kreeft presents a unique book about the important beliefs that Catholics and Protestants share in common. Inspired by Christ's prayer for unity in the Gospel of John and Saint John Paul II's encyclical Ut Unum Sint, Kreeft demonstrates that Christian reunification is possible. While he acknowledges that there are still significant differences between Catholics and Protestants, he emphasizes that they agree on the single most important issue: justification.

The style of this book is modeled on Pascal, Solomon, and Jesus: short answers and single points to ponder rather than long strings of argument. The writing is direct, simple, and confrontational, but vertically rather than horizontally by ""directing arrows not against each other (Protestant or Catholic) but against our own hearts and minds and wills.""

The purpose of this book, writes Kreeft, is to be ""like an Australian sheepdog, herding and hectoring Christ's separated sheep back to His face. For that is the only way they can ever return back to each other.""

"Peter Kreeft has a remarkable gift for expressing complex issues in lucid, accurate, and pithy ways. He also has the fairness and insight needed to undertake a tractate to bring Catholics and Protestants into closer union. This book will no doubt help understanding and dialog between both."
— Robert J. Spitzer, S.J., Author, The Soul's Upward Yearning

p>"No one has taught me more about what healthy ecumenism looks like than the brilliant and eloquent Peter Kreeft. He is a peerless apologist for truth and has been an inspiration to me for over two decades on the happy and vital connections between serious Catholic and evangelical faith."
— Eric Metaxas, #1 New York Times Bestselling Author, Bonhoeffer; Host of the Eric Metaxas Show

p>"Readers will expect-- and be gratified to find -- what we always find in any work by Kreeft: thorough, solid, intelligent work, and agile prose style, brought to the service of dependable content. This book should help us to find a real step forward in the mutual understanding of these two sectors of the Ancient Faith."
— Thomas Howard, Author, On Being Catholic

"Peter Kreeft, one of our finest Christian writers today, has given us a passionate plea for Christian unity, one that builds upon the great common core of Christian belief confessed by faithful Protestants and Catholics alike. A volume full of faith-and hope."
— Timothy George, Dean of Beeson Divinity School of Samford University

p>"In his unique style, Kreeft avoids academic verbosity and cuts right to the chase. His uncanny ability to reduce the complex into readable text is like poetry in motion. Christians from various traditions will find this book a pleasure to read."
— Stephen Ray, Author, Crossing the Tiber

p>"If only this book had been written five hundred years ago! Peter Kreeft is a reliable sherpa, guiding us safely through the theological and historical impasses into which countless unwary Christians have stumbled."
— Patrick Madrid, Author, Life Lessons; Host of the Patrick Madrid Show

p>"This is a book that lives up to its title, and will be a useful resource for any Catholic with Protestant friends or colleagues - and vice versa. It invites the reader to explore these often contentious issues with respect for both perspectives, and with genuine hope for resolution and reunion."
— Holly Ordway, Author, Not God's Type