The third Hello Ruby book is soon out! Pre-order now »


Hello Ruby is the world's most whimsical way to learn about computers, technology and programming. The story started with a book, and now Ruby continues her adventures in exercises, games and apps. It’s suited for kids age 5 years and older (but even adults might learn something new).

I wANt tHe BooK!

Written about Ruby

“Hello Ruby is way more than a children's book”

Fast Company

“The heroine of Liukas' book is a girl, but it's not a book for girls.”


“Hello Ruby has obviously struck a chord. ”


“Getting girls into programming, one children’s book at a time ”