{"product_id":"9783540171768","title":"The Mathematical Structure of the Human Sleep-Wake Cycle (Lecture Notes in Biomathematics) \u003c69\u003e","description":"\u003cp\u003eOver the past three years I have grown accustomed to the puzzled look which appears on people's faces when they hear that I am a mathematician who studies sleep. Instead they ask the questions that fascinate us all: Why do we have to sleep? The questions that have concerned me deal instead with the timing of sleep.\u003c\/p\u003e","brand":"Springer","offers":[{"title":"Default Title","offer_id":49026165178595,"sku":"00000_00000_00000_00000","price":54.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/usa.kinokuniya.com\/products\/9783540171768","provider":"Books Kinokuniya USA","version":"1.0","type":"link"}