I’ve written a number of times about the occasional ebook sales Diane Duane runs on her self-owned ebook store, but this one has a special urgency. A series of medical expenses and lower-than-expected royalty payments have put Duane and her husband, Peter Morwood, in danger of losing the home where they’ve lived for the last twenty years.

To raise some money, Duane has slashed prices by 50% on Ebooks Direct, the ebook store she runs for the books to which she and her husband have the ebook rights. All titles are DRM-free and multiformat, and include the guarantee that if you ever lose the ebook files, they’ll replace them free.

There are some great books there—the Young Wizards New Millennium Editions, Feline Wizardry trilogy, and associated Young Wizards novellas, the Tale of the Five, and many more. If you haven’t read them yet, this would be a great time and a worthy cause.

Update: Diane Duane writes on Twitter that they’ve made enough sales in just one day to resolve their financial difficulties, and thanks everyone who helped out. The sale is still on at the moment, so if you still want to pick up some great books at half-off, grab them while it lasts.