Actually this is another example of Betteridge's law. If you replace "book" in the headline with "one letter flipbooks of 9 pages or less" (from the paper), the

Actually this is another example of Betteridge's law. If you replace "book" in the headline with "one letter flipbooks of 9 pages or less" (from the paper), then we'd have a counterexample. Still really cool, but a long way to go before we can actually do what the headline teases.