Book Split Test: Rob Roseman’s WTF Divorce Journal

Most people take years to write a book. Rob Roseman did it in 4 weeks. His secret? Market testing every step before publishing — directly with his Instagram followers.

Testing Covers in the Wild

Look at his split test examples: six book covers, all bright, punchy, and designed to pop on social media. Rob let his audience choose by engagement, not opinion. The winning look became his final design.

Why It Works

• Used real audience data to guide creative choices
• Validated titles and visuals before investing in print
• Built momentum online while creating the product
• Eliminated guesswork — everything was pre‑proven
• Turned followers into co-creators and buyers

Other Quick-Test Wins

• Oreo tests new flavors on Twitter polls
• Netflix A/B tests thumbnails to boost clicks up to 20%
• Morning Brew tweaks subject lines daily for 5% more opens
• Canva iterates UI designs live via feedback channels

Move fast. Test tiny. Publish what already resonates.