My 2006 book on Heidegger, Speaking Against Number, has been reduced in price at last. It has been over £50 since publication, and a paperback, though initially promised, never appeared. It is now available, in the UK at least, for just less than £20. Details at the Edinburgh University Press site – though the price is also reduced on Amazon in the UK and appears to be reflected in US marketplace prices, even though Columbia UP, who distribute it in the US, still have it listed at the older price.
One of the chapters is available open access here –