I know there's an OU library, and I can recommend Google Scholar too ... but there is a fallback position that works when these have failed. Believe it or not, Amazon.
Going on nothing more than 'Quoted in Mountcastle, 'On the Move' I track down the author John W Mountcastle and various books of his, including this one, on Amazon. I don't need to buy it, just reference it correctly unlike the author where I first found him.
A module could be written entirely around a set of books, ideally eBooks, available on Amazon. A canny college might prepurchase a dozen such books and preload them onto something like a Kindle 'Paperwhite' and give them to students. I'd buy it; the idea at least.
The University of Northumbria preloaded all the books for First Year Law Students course onto an iPad which they gave to students back in 2011.