[Brass Check wrote] the playbook for the dark arts of exploiting the media."

#1 New York Times bestselling author of
48 Laws of Power and Mastery


CEO and founder, American Apparel


Behind my reputation as marketing genius there is Ryan Holiday, whom I consult often and has done more for my business than just about anyone."


The strategies Ryan created to exploit blogs drove sales of millions of my books and made me an internationally known name."

#1 New York Times bestselling author of
I Hope They Serve Beer in Hell


#1 New York Times bestselling author of
The 4-Hour Work Week, The 4-Hour Body
and The 4-Hour Chef


Ryan is part Machiavelli, part Ogilvy, and all results. From American Apparel to quiet campaigns he's run but not taken credit for, this whiz kid is the secret weapon you've never heard of."


Brass Check was always there when I had questions, they know the ins and outs of the industry and helped make this book a bestseller."


New York Times bestselling author of Fantasy Life and ESPN's senior
director of fantasy sports


Brass Check is a marketing firm that specializes in creating spreadable messages. Its marketing expertise is behind numerous bestselling books, including I Hope They Serve Beer in Hell, The 50th Law, Mastery, The 4-Hour Chef, Choose Yourself, and Trust Me I'm Lying. Our clients have ranged from Marc Ecko to Seth Godin and Paulo Coelho to billion dollar brands like American Apparel. Most of our work remains unattributed.