 PLOT: SPOILER: Norman discovers Harrys mistake in translating the  code by analyzing the name Jerry. But if the letters J & E had been  transposed with H & A, all words with any of those letters would  have been misspelled. But they arent. The only word that shows the  error is "Jerry". Also, Harry cracked the code based on the  assumption that it was the sphere sending the messages; hence the  spiral decryption. But it wasnt the sphere 