Kobo has a huge buy one, get one free on romance right now. Couldn't see anything about it on the Kobo homepage but here's the links that an author sent out in a newsletter. I can verify it works, I bought two books and it discounted the second one 100%.
US =
https://kobo.com/us/en/p/bogofreeromanceus
AU =
https://kobo.com/au/en/p/bogofreeromanceau
NZ =
https://kobo.com/nz/en/p/bogofreeromancenz
UK =
https://kobo.com/uk/en/p/bogofreeromanceuk
CA =
https://kobo.com/ca/en/p/bogofreeromanceca
Sorry the links didn't come out clickable but just copy/paste them and they should work.
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Mod: Fixed links]