"Here then, ta-da, is the current draft of pre-fascicle 6a (318 pages). This is revision 1, dated 08 July 2015."
Isn't the AoCP series a little too dense to be read as an ebook? It isn't really organized as a reference and requires one to pore over it for a long time. Not having a mobi/epub also rules out several good ebook readers. Are there good ebook readers that have e-ink but still manage to render PDFs well? My Kindle Paperwhite is trash at PDFs.