Sherlock Holmes and the Zombie Affair is now on Smashwords and Amazon Kindle sites. As of now - May 27th 12:12am - 2 have sold on Kindle UK, 6 on Kindle US, and 13 on smashwords - of those 12 were free with the coupon.
This is the first week. Should be distributed to Sony, Apple, Kobo etc soon, via smashwords.
This is a tiny niche in the publication world, so the good thing is not much competition. Fiction-Mystery-British-Detective