I was amused to see in the Macmillan page about the book that it is listed as weighing 0 Kg. That seems to me very light for a book of 576 pp. Could it be that the weight is indeterminate, customisable according to requirements, the book is after all Print On Demand? Perhaps one can order a deluxe version on Indian paper, that would weigh very little, but surely at least 0.2 Kg? The British Library (which presumably gets a free copy) should look after posterity with a copy printed on vellum.
The weightless version of Charkin Blog is still here.