Patent ID: 8538318

Claim:
An interactive electronic book system, comprising: a book including a front cover, a back cover, and a plurality of pages including visual content, wherein said front cover and each of said plurality of pages further includes a pagination magnet, each of said pagination magnets aligned with the other said pagination magnets so as to overlay one another when said front cover and said plurality of pages are closed; a magnetic sensor in close proximity to said back cover and aligned with said pagination magnets, said magnetic sensor configured to produce magnetic sensor electrical output related to a cumulative magnetic field from said pagination magnets detected by said magnetic sensor; a temperature sensor connected to said book, said temperature sensor configured to produce temperature sensor electrical output related to ambient temperature; a speaker; a digital computer in electronic communication with at least said magnetic sensor and said speaker, said digital computer including a non-volatile memory, volatile memory, a microprocessor, an analog-to-digital converter for converting said magnetic sensor electrical output to a digital form, software instructions for operating said digital computer stored in said non-volatile memory, calibration data related to said magnetic sensor stored in said non-volatile memory, temperature compensation data relating to said magnetic sensor and said pagination magnets stored in said non-volatile memory, and audio content related to each of said plurality pages of said book stored in said non-volatile memory; and said digital computer configured to use said magnetic sensor electrical output, said temperature sensor electrical output, said temperature compensation data, and said calibration data to determine which of said plurality of pages of said book is open to, and configured to cause said speaker to play said audio content related to said open page.