If anyone has Kindle Prime in the UK there's a new thing attached to it called 'Kindle First'. Just noticed it on a fly-by and took The Glassblower but there are another three choices if that one doesn't tempt you.
I haven't read into how it works (beyond signing up for the monthly newsletter) but I think you get to choose 1 of 4 free ARC's monthly as part of your Prime deal.
Amazon Publishing editors select four new books each month.
Prime members can choose one featured book for FREE every month.
Books are available in advance of their official release date.
Might be interesting to someone :)