Noticed that there is a pdf version of the US Gold book available and subsequently contacted Chris Wilkins via Kickstarter telling him that I'd purchased the History of Ocean book and wondered if a pdf was available for that one?
He emailed back almost immediately with a link to a pdf of the Ocean book! Top bloke.
I have now backed the History of US Gold book on Kickstarter!
Edit: Just had a further reply from Chris on Kickstarter;
'You guys need to come to the Revival event in August - be good to meet a lot of you chaps,
There is an iBook version nearly done as well
Details for Revival 2014 here: