"That they all may be one" was Jesus' first-century prayer. With mind and emotions set towards Golgotha, he poured out his heart to the Father. But what is our twenty-first-century reality? Local churches are siloed. Pastors do not know one another and rarely work together. Christians drive by church buildings on their way to Sunday worship and seldom pray for one another. Vitriolic disunity spews across social media in front of an onlooking world. Our culture sees our fractured reality and increasingly dismisses Christianity as a viable option for their lives. And it is time for believers to recognize that it is our fault. But there is hope! When Collaboration Mirrors the Trinity is a timely invitation for local churches to make the practice of unity our new normal. Avery Stafford presents a biblical model to actualize this invitation. He details four rhythms that mirror the loving community of the Triune God. Each one can help pastors, lay leaders, and faith communities deepen their resolve to bless the world through effective gospel partnerships. This work is a bold call for believers to discover an untapped resource for the gospel--the believers who attend other churches in their city.