Books like Sword Art Online: Aincrad - Manga
Reki Kawahara
Sword Art Online: Aincrad - Manga is 384 pages, about 7 hours 2 minutes at 250 words a minute.
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How long each takes
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Fundamentals of Game Design 11.0 h 
Reality Is Broken 7.2 h 
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Cryptos 8.2 h 
Level Up! 9.5 h Bar height shows length. Estimated at 250 words a minute.