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sleep lifehacks books
book-review -mmed
私がこちらの本を購入した動機はタイトルにもあるように効率的睡眠の術を知る事。
しかし読破した現在の私は睡眠の事のみならず脳の持つ恐るべき可能性の一端まで垣間見た事による心の高揚を隠し切れずにいる。
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