Hacker News Reader

I believe the ebook option at http://apress.com/book/view/1430219483 is a PDF.

It is. I've been reading it during my commute (it's ok - it's by train!) for the last week.

I went there literally ready to punch in the CC#.

But $21?! I might as well pay the extra $9 and have a nice physical artifact to show for it.

Or you can save a dollar and get the hardback from Amazon. O'Reilly is having the same issue setting prices for their eBooks against Amazon[1].