Camilla Hessellund lastein, 25

Founder, Lix Denmark After learning that only 2% of textbooks are digitized, Lastein founded Lix, a subscription-based digital textbook app: “You have the convenience of having the book everywhere you go.” Lix has raised $7.5 million from investors, including danish billionaire Anders Holch Povlsen. And it has convinced major publishers such as McGraw and oxford to digitize their libraries.