Yellow Cab
Hertz transformed a small Chicago taxi operation into Yellow Cab, introducing the iconic yellow color and new standards of service. It became America’s dominant taxi business.

A book project · Viktor Riško × THE YELLOW PROJECT
Discover the story of John D. Hertz, from Sklabiňa to American business. We’re seeking partners to bring his life to the page—and share it with a wider audience.
A historical verdict
B.C. Forbes, founder of Forbes magazine, on Hertz’s career
“One of the most inspiring and most illuminating romances of modern American business.”
The legacy
Immigrant. Entrepreneur.
Innovator. Philanthropist.
Hertz transformed a small Chicago taxi operation into Yellow Cab, introducing the iconic yellow color and new standards of service. It became America’s dominant taxi business.
In 1923, Hertz acquired Walter Jacobs’ car rental business and created Hertz DriveUrSelf, laying the foundation for today’s Hertz brand.
When Paramount Publix faced bankruptcy, Hertz became its finance chairman, helped engineer the company’s financial turnaround, and oversaw its transformation into Paramount Pictures.
In 1957, John and Fannie Hertz established the Hertz Foundation to support America’s future scientists and engineers. Their legacy continues through the Hertz Fellowship.
Companies and brands named here are part of John D. Hertz’s history. They are not sponsors of this project.
Current focus
The book comes first. Movie and museum are the wider vision of the project.

The definitive account of the man who painted America yellow — researched with U.S. collaborators and now moving towards manuscript development.
Our goal: a No. 1 New York Times bestseller, with a vision for worldwide translations.
Chapter II — The War Room at the Waldorf. New York City, 1924 · 16 pages
Book project only. Movie financing is separate.
An ambition to bring the extraordinary story of John D. Hertz to the big screen and audiences worldwide.
A vision to establish the world’s first Yellow Cab Museum in New York City, celebrating an American icon and its legacy.
The Hertz story featured in Forbes Slovakia.
Read the articleResearch collaboration with business historian Gary Hoover.
Watch Gary HooverHertz Foundation corrects his birthplace to Sklabiňa, Slovakia.
YELLOW launches internationally with the first permanent Hertz Inspirational Room in Sklabiňa.
Watch the openingNOW · 2026
Invited to present YELLOW in Washington, D.C. and New York.
NEXT · 2027
Manuscript development with writer and researcher Adam Sleper is planned for 2027.
Support the book
The founder
Viktor Riško
Founder of Triumph Gallery · Initiator of The Yellow Project
At the Tomas Bata Foundation, I came to believe that one person’s story can change what someone else sees as possible. I began searching for overlooked stories with roots in the place I call home. That search led me to John D. Hertz.
He emigrated as a child from Sklabiňa, a small village in what is now Slovakia. His legacy reaches from yellow taxis to support for new generations of scientists. I wanted people at home to know his name. The more I learned, the more I wanted his story to travel.
Where we begin shapes our opportunities. It should never decide whose dreams deserve to be taken seriously.
Today, an exhibition in Sklabiňa brings his story to new visitors. The book is our next step. My wider ambition is to share his story across borders and generations, through exhibitions, education and, one day, a movie.
A business, an idea, a helping hand—there are many ways to contribute. My hope is that, wherever this story travels, it helps someone ask:
What could I begin?
Support the project
Support the book with a one-time bank transfer in euros, or email Viktor to discuss support individually.
Support the bookFor individuals, organisations and institutions who want to support the book, explore the movie or museum, or partner with the wider vision.
Book contributions support the book project only. Partnerships are agreed individually and may support the book or other agreed areas of the project. Neither is an investment; neither carries financial return or ownership.
The book budget
The budget covers the book only — research and archives, writing the manuscript, editorial and publishing preparation, and bringing the finished book to readers. The PDF sets out the full production plan over seven pages.
| No. | Funding area | Budget | Share |
|---|---|---|---|
| 01 | Project Management & Production | $42K | 16.8% |
| 02 | Historical Research & Archives | $40K | 16.0% |
| 03 | Manuscript Writing | $55K | 22.0% |
| 04 | Editorial & Publishing Preparation | $31K | 12.4% |
| 05 | Travel & Field Research | $22K | 8.8% |
| 06 | Marketing, PR & Fundraising | $35K | 14.0% |
| 07 | Legal, Administration & Contingency | $25K | 10.0% |
| Total | $250K | 100% |
Support the book
Your support funds the book. You can contribute by bank transfer in euros, or email Viktor to discuss support individually.
Contributions are not investments and carry no financial return.
Support the book by bank transfer.
View bank detailsYou can also support the book by a bank transfer to the project’s account. Please send transfers to this account in EUR. The website does not calculate currency conversions.
Bank transfers are confirmed manually. They do not automatically add your name to the supporters list.
viktor.risko@triumphgallery.skFAQ
Book contributions fund the book only: research, writing and publishing preparation, with a total budget of $250,000 across seven areas. Partnerships are agreed individually and may also support the movie or museum development or the wider vision — both are ambitions, not yet produced.
No. Manuscript development with writer and researcher Adam Sleper is planned for 2027. Our goal is a No. 1 New York Times bestseller, with a vision for worldwide translations.
Not yet. Both are wider ambitions of THE YELLOW PROJECT, beyond the current book project.
Card contributions are not available. You can support the book by a EUR bank transfer to VIKTOR & MARKETING FRIENDS s. r. o. — the details are in the “Support the book” section above — or discuss support individually with Viktor. He confirms transfers manually; email him at viktor.risko@triumphgallery.sk.
Viktor Riško and Triumph Gallery Slovakia, working with the book collaborators listed above.
Triumph Gallery Slovakia
Triumph Gallery Slovakia is a cultural and educational initiative founded by Viktor Riško, dedicated to rediscovering forgotten stories of remarkable Slovaks who helped shape the world. Through storytelling, exhibitions and education, it turns forgotten legacies into inspiration for future generations.
Visit the virtual gallery“Great stories don’t disappear. They wait for someone to find them.”
— Viktor Riško
What happens next
Email Viktor to discuss the project and possible collaboration. You can also save an enquiry in the form below.
Book partnerships support research, manuscript development, and editorial and publishing preparation. Together, we’ll agree on the scope, contribution, and next steps.