The idea that it should be in the shape of Einstein’s iconic head—that hair—remained. As did the idea of getting some of the world’s most dexterous creators in science, the arts, and social justice to weigh in. But instead of their signatures, they would lend the same thing that Einstein is best known for—their most visionary ideas in the form of a poem, perhaps, or an essay, or maybe even a sketch. There will be a total of 100 contributors spread out among 10 categories—from science to literature to leadership, technology, and space—with the idea that the book will me more than just a book. It’ll be a time capsule, embodied in its limited-edition run of just 300 to be unveiled this fall in Montreal at what the Einstein Legacy Project is calling the “Dinner of the Century.” So far, Nobel physicist Steven Chu. architect Frank Gehry, and authors Chimamanda Ngozi Adichie and Paulo Coelho are among those who have committed to the project.