Explore the book series
Zerus and Ona live inside your computer, together with millions of other zeros and ones. It's The Binary World!
Welcome to our World
Zerus and Ona are now friends and do everything together. But, there was a time when they didn't know each other. How did they first meet? Read more »
Zerus gets a Virus
In this adventure, Zerus is infected by a virus and Ona takes him on an exciting trip throughout the computer. Will they find a cure for Zerus? Read more »
What humans are saying
John Gonzalez
Writer of Horizon: Zero Dawn
and Fallout: New Vegas
"Zerus & Ona is a rare delight, a fresh concept that perfectly fits a need in our high-tech culture.
Miriam Tocino's lovely art and storytelling offer children a warm, welcoming introduction to the potentially daunting world of computers' digital technologies.
One that adults will enjoy reading alongside them, too."
Rav Bumbra
Founder of Cajigo, Diversity Champion and Top 5 #WomeninTech
"Studies continue to evidence the gender gap in STEM starts in schools, so engaging children in the early years is key. Miriam Tocino understands how firing up passion in our children, especially girls, will undoubtedly lead them to be curious about technology, engineering and creativity.
Zerus and Ona make a great resource to spark that curiosity and can be used at home, in nurseries and elementary schools to help parents and educators on that journey."
Deborah Carter
Managing Director of NewTechKids
"What I love about Zerus & Ona is that it's a great way to encourage young kids to become curious about what technology is and how it works.
Storytelling opens up their minds and lays a great conceptual foundation for introducing activities such as robotics, coding and digital fabrication".
As featured in
