Georgette Heyer crime novels offer - The Book People

I mention The Book People's offers from time to time and the latest one to catch my eye is 10 of Heyer's crime novels for £9.99 (plus P & P):
The ten titles are:

* The Unfinished Clue
* They Found Him Dead
* Death in the Stocks
* Behold, Here's Poison
* Footsteps in the Dark
* A Blunt Instrument
* Why Shoot a Butler?
* No Wind of Blame
* Detective Unlimited
* Duplicate Death

Georgette Heyer wrote 12 crime novels, the two missing from the above set are: Penhallow and Envious Casca.