For the benefit of CrimeSpace readers, on my website I've posted links to over two hundred independent bricks-and-mortar bookstores in the US and elsewhere:
http://lastarksbooks.com/buy2.html
All have survived the rugged book sales environment of the last several years. About half now offer Google E-books. All mystery specialty stores of which I'm aware are included.
If there are others you think should be added, particularly in Canada, Australia, England, and New Zealand, let me know.
Best,
L. A. Starks
http://lastarksbooks.com