This book is about four courageous women who changed Silicon Valley forever. Silicon Valley, imbued with the spirit of the gold rush, has always been the territory of men: Steve Jobs and Mark Zuckerberg, William Hewlett and Elon Musk. However, four brave women - Mary Jane Hanna, Sonja Hoel, Magdalena Yesil and Teresia Guv - decided to change the balance of power. They later became known as alpha girls. The author of this book, Julian Guthrie, is convinced that “today alpha girls are everywhere, and their stories must be told.” Alpha girls are united not only by their contribution to the birth of great companies, but also by a passionate desire to change the world, explosive ambitions and perseverance in achieving goals. If you do the impossible every day, then you can safely count yourself among the clan of alpha girls.