Tom Phillips RA has just released his art book A Humument as an iPad application. Phillips has been working on this for 45 years. Read the article about the app in The Independent HERE. The website for the book is HERE.
The original book is rather tricky to track down (not least of the trouble is that there are various different editions of this from 1892 - at least 3 by the looks of it). A complete scanned PDF of the 1892 Chapman & Hall version that was used by Tom Phillips is available HERE.
The article that Phillips read in 1965 in the Paris Review is available online HERE.