In addition to the daily Twitter 1-hour freebie ebook giveaway, Dreamspinner Press have these additional sale coupons for presumably just today in the webstore (and I'd assume 1-time use, but I could be wrong):
- BlackFriday1 -free eBook w/ any order of $50+
- BlackFriday2 -extra 25% off any order of $25+
- BlackFriday3 -$2 off any order of $20+
Coupon #2 would seem to be the best value, as 25% of $25+ works out to at least $6.25, if I haven't messed up my math, which is easily the price of a free book already and you can load up the cart (and presumably it stacks with the current 30% off Thanksgiving weekend auto-discount).
Apparently there were some problems with them earlier, but they say they should be working now. (Also,

at them for saying right on the storefront page that you should sign up for their newsletter in order to receive special newsletter-only discounts for Black Friday, and then actually putting the discount information on Twitter only. This is not a good way to encourage sales, IMHO, if your customers cannot easily find the special sale info where they might reasonably expect it to be.

)