About The 28 Day Challenge
A series of business books built on one simple idea: meaningful change does not require changing your entire life overnight.
Big goals stay big. We make them daily.
The 28 Day Challenge started the way most of these things do: watching smart, capable people abandon goals they genuinely cared about — not because they lacked discipline, but because the goals never got small enough to act on.
"Fix our marketing." "Get better at sales." "Get our data under control." Each one is a mountain with no trailhead, so the natural response is to do nothing — and feel bad about it. We believed there was a better shape for this work.
Twenty-eight days. One discipline. One small action a day, delivered by email so it shows up whether or not you feel like it. Long enough to build something real, short enough to believe you'll finish. That's the whole method.
“It starts with one day. Then another. Then another.”
Our mission is to help people turn intimidating goals into manageable daily actions — in their businesses, their careers, and eventually their lives. Progress, not transformation. Forward movement, not overnight change.
Robert Coles
Robert Coles has spent the last 20 years developing a career in marketing, revenue operations, sales, and brand development. Spanning over a dozen industries, he's a highly sought-after consultant working with some of the largest brands and hottest products on the market. Robert developed the 28 Day Challenge series and supporting books to help businesses of all sizes and professionals of all levels expand their reach and learn new skills. Robert is a lifelong entrepreneur with over a dozen brands in his collection (and growing). Robert is based in Nashville, TN and spends as much time as possible with his family, partner, and dog, Theodore.
More about RobertThe values behind the books
Momentum over intensity
One small action every day beats a heroic push every quarter. We design for the week you're busy, not the week you're inspired.
Honest over hype
No get-rich-quick, no growth hacks, no guarantees we can't back. Just methods that work in real businesses with real constraints.
Teach, don't gatekeep
Every idea is explained clearly enough to do yourself. If you want a done-for-you version, great — but you'll never need one to understand it.
Personal, always
These systems were built by people who ran them at small scale. The writing talks to you, not at a market segment.
What we make
28-Day Challenges
Twenty-one business disciplines — each a book and a 28-day daily email system, in paperback, Digital Reader, and audiobook.
BrowseSupporting books
Field manuals and deeper dives — the ideas that surround the method, like RevOps'd to Death and the Rapid Delivery Blueprints.
Visit the bookstoreMini-challenges
Fourteen days, no book — one daily lesson and one small action. Thirty of them, launching January 2027.
See what's comingOne day. Then another.
Every challenge starts with a single daily action. Yours starts today.
