Mistakes That Worked: 40 Familiar Inventions and How They Came to Be

Presents the stories behind 40 things that were invented or named by accident, including aspirin, X-rays, frisbees, silly putty, and Velcro. Turtleback binding is a highly durable alternative to a hardcover or paperback book. The comprehensive cover reinforcement process will drastically combat wear and tear, keeping your favorite books in great condition for years to come! Turtleback books are ideal for any reader, or for use in schools or libraries.