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This book is actually free. It can be downloaded from https://www.withouthotair.com/download.html
PDF version is here: http://www.inference.eng.cam.ac.uk/sustainable/book/tex/sewtha.pdf
这本书比较有意思的地方是分析问题的方法:对各种能量,先用数学进行量化,然后再分析这种能源是否能够scale up.