The cheapest I have found was �50 on Abe books plus postage and packing from America.
If you can get it for �37 then grab it ....!
Mind you it's bound to be issued in a large paperback format sooner or later.
It's on my local library catalogue .You may be able to borrow it from your local library.
I would love to read it but will end up borrowing it ...I cannot justify that amount of money for a book.
If I like it and want to have it to keep....it will go on my birthday and Christmas list !