“A rousing tale of self-reliance, community, and standing up to bullies.”
—Cory Doctorow, sci-fi author

“Introduces readers young and old to the power and peril of software. Behind it all is a backdrop of ethics of knowledge sharing upon which the arc of human history rides.” 
—Vint Cerf, computer scientist and one of the inventors of the Internet

“If you have a child curious about software development, this book might be just the right thing to pique their interest.”
—Jack Wallen, Linux Magazine

“Such a fun children’s book about getting hands on with tech and the importance of an open ecosystem for development. . . I love the illustration too”
—Una Kravets, UI & Tooling Developer Relations Team Lead at Google Chrome

“I hope this will influence young people, and especially those who feel ‘I can not do that’ to take that first step into the community of Open Source software, hardware and culture.”
—Jon “maddog” Hall, Board Chair, Linux Professional Institute

“It is very important for the world to understand that ‘the right to tinker’ and ‘the right to repair’ are essential to the development of future generations. . . . I want future scientists and engineers to be able to build stuff and modify the software, with friends, in the way that I did.”
—Gerald Jay Sussman, Panasonic Professor of Electrical Engineering, MIT

“An uplifting parable for our greed- and power-infused times.”
—Dan Gillmor, Director of News Co/Lab, Arizona State University

“Explaining what we do is challenging at times, but this book does so gracefully. I’m sure this cute little story will help both kids and many parents about technological empowerment.”
—Aleix Pol, Hacker, KDE e.V. President

“Ada & Zangemann proves that the argument for software and hardware freedom is simple: We should be able to do what we want with ou