What to read next
by David Platt
David Platt's Radical challenges comfortable, culturally-shaped faith by holding it up against the actual demands Jesus placed on his followers, pushing readers to ask whether they've quietly traded the gospel for the American Dream. Groups that finish it tend to want either more of that same bracing challenge to sacrifice and obedience, or a book that channels the same conviction into a concrete next step, whether that's generosity, risk, or a slower pace of discipleship. The books below cover both directions, ranging from equally confrontational calls to costly faith to gentler, more practical studies on specific disciplines.
Our Radical guide runs 10 sessions with 79 discussion questions.
These are guides from our own catalog, ordered by how much each book shares with Radical: subject and themes first, then the kind of group it suits, then the same author. It is an editorial comparison of what the books are about — not a ranking of which is better, and not a claim about what other groups chose.
by David Platt
This is Platt's own follow-up, and it presses the same core question of Radical even further: is the Jesus we follow the biblical Jesus, or a comfortable stand-in? The tone and pace are nearly identical to Radical, at 11 sessions and 78 questions, so it works well as a direct sequel for a group that wants to keep going in the same vein.
by John Mark Comer
Comer shares Platt's conviction that following Jesus means total apprenticeship rather than casual belief, but where Radical is a wake-up call, this book is more of a how-to, building toward an actual Rule of Life. At 12 sessions and 96 questions it's longer and more methodical, better suited to a group ready to move from conviction into daily practice.
by Henry Blackaby & Claude King
Blackaby's classic shares Radical's insistence that faith is meant to be active and real rather than routine, but the emphasis shifts from sacrifice and mission to listening for God's voice and joining his work. It runs longer, at 14 sessions and 102 questions, and its tone is steadier and more devotional than Platt's urgent, confrontational style.
by Randy Alcorn
Alcorn takes one thread from Radical, the call to loosen our grip on money and possessions, and builds an entire short study around it. At 9 sessions and 60 questions it's the shortest book on this list and far more focused, making it a good next step for a group that wants to go deep on generosity specifically rather than discipleship broadly.
by John Ortberg
Ortberg's central image of stepping out of the boat captures the same call to risk and abandon comfort that runs through Radical, though his tone is warmer and more encouraging than confrontational. With 12 sessions and 83 questions it's a bit longer, and it leans more on story and personal reflection than on direct challenge.
by John Mark Comer
Comer identifies a different enemy than Platt does, hurry rather than comfort or consumerism, but the underlying argument is the same: American culture has quietly reshaped our discipleship without our noticing. It's the longest option here, at 13 sessions and 104 questions, and its tone is more reflective and diagnostic than Platt's urgent call to action.
by Kyle Idleman
Idleman's fan-versus-follower distinction is very close in spirit to Radical's critique of easy, low-cost Christianity, and the two books share a similarly direct, confrontational tone. At 12 sessions and 85 questions it runs slightly longer, and it leans more on personal stories to make its case than Platt's argument-driven style.
by John Piper
Piper's book shares Radical's alarm at comfortable, self-focused living and its call to spend your life on something bigger, and the two authors write with a similarly passionate, personal urgency. It's close in length at 10 sessions and 71 questions, making it a natural next study for a group that wants the same intensity aimed at questions of purpose and calling.
Session and question counts checked .