now, if you don't have a robert sabuda in your bookcase, then your bookcase is not complete. >> the robertis is the "wizard of oz." this is the twister. it really twists. how did he do that? >> to get an answer to that question, we visited robert's farm in upstate new york. you may recognize it from his horse barn. inside is robert's studio. for somebody who is so often published, i'm struck at how small your studio is. [ laughter ] >> the magic can happen in small spaces. >> big ideas come to life with a stack of paper and an exacto knife. >> you have no idea how many of these i used. >> it made him the pioneer of popup books. >> i think of books like little worlds. i wanted little worlds to come alive and open up in a completely full 3d-way. >> when i open this and i see this, what reaction do you want from me? >> we call this the wow reaction. we live in a very fractured world of young people's time. if you can get that time with a book, you're winning. >> from fairy tale classics like "beauty and the beast" to sharks, dinosaurs, even holiday themes, robert's books have sold millions of