Number Grid
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SPOILER
You can solve the puzzle by clicking in the following order 4-2-2-3-4-2-4 and reaching the goal reveals the following letters: C O N T E S T.
Poseidon's picture is in the San Fransisco projection [1]. Athena and Poseidon (god of the seas in Greek mythology) had a contest over who would be the patron deity of the city that would become Athens.
Answer: ATHENA
Next book: History Lesson
![[1]](http://vanishingpointwiki.com/wiki/Image:Projections_San_Francisco.jpg){kind=link}