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Open Book Challenge
Get $100K to build a better Facebook.
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2 reviews
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Recent Open Book Challenge Launches
Open Book Challenge
Get $100K to build a better Facebook.
Launched on March 21st, 2018
7
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5/5 based on 2 reviews
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presh
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5 reviews
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7yr ago
Bret Kinsella
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6 reviews
Think big. Start small.
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