If you want the new heme it will cost 134.95 (including shipping), it's one of the few money makers they have in the series.
To be perfectly clear for truth seeking medical students out there (you know who you are), I base my assumption on the fact that I heard one of the WHO Heme authors say that the WHO was looking to discontinue the whole series in spite of the fact that the heme book makes money; there was some lobbying to keep the heme book around and release an updated edition.