The Fairy Tale Bride (Once Upon a Wedding) by Kelly McClymer is currently priced at $0 for its Kindle edition. This is a part of a series originally published by Kensington Zebra Ballad in October 2000 and now rereleased in ebook format by the author.
Description from the publisher:
Miranda Fenster was known as the Fairy Tale Miss during the one disastrous London season that convinced her she would never have a happily-ever-after. But when her brother's love match is thwarted by the impossibly proper Duke of Kerstone, Miranda sets off to convince the duke to champion her brother's cause for love. Unfortunately, he is too proper to consider love a suitable reason for marriage, and too proper not to marry Miranda when they find themselves compromised. Now, Miranda has a second chance for happily-ever-after, if she can uncover her new husband's darkest secret.
And here's a snippet from a reader review--not positive--but showing that fairy tales do play a part in the novel:
The one thing that annoyed me to no end was the heroine's "cutesy" way of likening everything around her to various fairy tales. Every time it made her seem like a juvenile, naive idiot, when the rest of the time she was rather level-headed and even cynical at times. It was jarring each time, but I enjoyed the rest of the aspects of the book.
Free is nice if you are interested....