Books about polyphasic sleep
- Why we nap by Claudio Stampi; talks about polyphasic sleeping.
- At Day's Close: Night in Times Past by A. Roger Ekirch. Talks about historic sleep patterns (mostly biphasic, of a variety of types)
- Buy from Amazon: Change Your Life Without Getting Out of Bed : The Ultimate Nap Book by SARK; seems to be talking about biphasic sleeping.
Some of the following may also interest you
None are known for certain to talk about polyphasic sleeping, but they should provide a plethora of information on the topic of sleep, which may help some in your quest for information
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