The oddly named Smashwords July Summer/Winter Sale is on now through July 31. Authors may opt in to this sale and provide coupon codes worth 25%, 50%, 75% or 100% off of the cover price for whichever titles they'd like to enter.
If you go to
Smashwords' main page you can click on "Browse Books on Sale" in the upper left of the page. You can further refine the search results by Genre, Price, etc. Most of the books are by Indie authors, but there are a few small publishers who distribute through Smashwords and have entered some books.
Since authors can select specific titles to enroll in the sale you will have to do a little digging to come up with books you'd like to read.
To get you started I can suggest the first volume in the
Tommy Two Shoes mysteries, The Tommy Two Shoes Mysteries: From Mountains to More -- published by Laurel Highlands Publishing, which seems to be a very small but legitimate publisher. In my review I gave this collection of stories 4 Stars out of 5. The tone is very "Joe Friday just the facts, ma-am" with the added feature of a somewhat unhelpful ghost who provides cryptic clues. The regular price is $2.99, but it's free with the coupon code.
The Tommy Two Shoes Mysteries: From Mountains to More