Are you prepared to take the Penumbra challenge? Solve the puzzles in this treasure hunt for a chance to Win a Nook at the May Breakfast. Below are the encrypted names of public places, museums and businesses in Rhode Island. You must test the different ciphers and codes against each clue to uncover the names of each location. Location names were encrypted using different types of substitution and transposition methods including: QR Codes, Scrambles, Caesar, acrostics, and Vigenère tables.