Book excerpt: What is church? What spaces does church occupy? Can ecclesial space exist beyond the boundaries of church? In An Interweaving Ecclesiology Mark Scanlan offers a fresh vision of Christian community as constructed for and by participants as potential ecclesial spaces combine to create an experience which we call “church”. Drawing in particular on research into the dynamic between youth groups and the churches within which they operate, Scanlan brings us a distinct approach to the church in mission that can nuance and develop the tired and sometimes flawed thinking around Fresh Expressions and pioneer ministry. Combining deep ecclesiology with a practical approach, this book will be useful to students and scholars of pioneer and youth ministry and those with a wider interest in how churches operate.