The book is 58 euros on amazon.fr, 1 day for me, x-months in China, y-months in africa. many days of work in South America, 4674 roupies = 80 dollars in India and the average salary is 1570 dollars a year, 3+ billion people can't buy it, half of humans ? C'est indécent. The reason why I did that is simple. The Ramanujan Notebooks are about 60000 roupies. http://www.amazon.in/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=... 1 volume 13484 roupies, salaries = from 400000 to 900000 roupies a year but this is for engineers/computer scientists which gives (?) 1 month of salary for average people. in fact, the price is about the same or higher in other countries compared to u.s.a. but the local salaries are far from the same. best regards, Simon Plouffe