I just noticed that Kobo is having a weekend (through April 21) sale, with up to 70% off (
http://www.kobo.com/weekendsale?style=onestore).
The sale is on various genres:
"Riveting Fiction"
"Electrifying Mysteries"
"Hot Romance"
"Fantastic Non-Fiction"
"Irresistible Kids and Teen Titles"
"Top Inspirational Titles"
There are a huge number of titles in non-fiction, the only category that I checked. Maybe it's the same with the rest of the categories.
If you're like me, however, you much prefer the Kindle format, for several reasons. Well, I did a spot check of Amazon's prices on three non-fiction books and they match Kobo's prices! Maybe that's the way that it is with the rest of the books.
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I'm saving so much money on ebooks . . . . that I'm about to go broke.