To celebrate/promote its release of Lucius Shepard's final novel, Subterranean Press is dropping the prices of its other two Shepard e-books for one week. From August 4th (yesterday) through August 10th,
The Best of Lucius Shepard (regularly $2.99) and
The Dragon Griaule (regularly $4.99) are only $1.99. Those links will take you to the publisher's site, where you'll find direct links to purchase pages at Amazon US, Barnes and Noble, and Kobo. I believe SubPress e-books are only available to US buyers.
There's one story that appears in both these collections, but otherwise the contents are distinct.
The Dragon Griaule is a set of linked stories that also connects to that newly-released novel,
Beautiful Blood, which is also available as an e-book, but at the full price of $6.99.