Ian Pace’s new recording of Michael Finnissy’s five-and-a-half-hour piano cycle The History of Photography in Sound, was released in October, and is now available via Amazon for under £23 – see http://www.amazon.co.uk/dp/B00GCST93I/ref=tsm_1_fb_lk
Also, on the website of Divine Art records, is a hugely extended version of the programme booklet, amounting to a 290-page book on the work considering each of its chapters in turn, as well as the cycle as a whole, with a wealth of musical and other examples. This can be downloaded for free here – http://www.divine-art.co.uk/CD/HOPIS.htm