This could well be a good book, but I found it really annoying that there isn't a price on the landing page. Especially when you're offering 10% off for HNers -

This could well be a good book, but I found it really annoying that there isn't a price on the landing page. Especially when you're offering 10% off for HNers - 10% of what? If I've got to click the 'get it now' button just to find out the cost, I'm more likely to click the little cross on the tab.