The Merry Gentry series by Laurell K. Hamilton contains nine books: A Kiss of Shadows, A Caress of Twilight, Seduced by Moonlight, A Stroke of Midnight, Mistral's Kiss, A Lick of Frost, Swallowing Darkness, Divine Misdemeanors and Shiver of Light.
The Merry Gentry Series is about a faerie princess turned private investigator named Meredith Gentry, according to Laurell K. Hamilton's website. The character, also known as Merry, is "the only Sidhe royal to be born on American soil," and she must protect herself against attempts on her life.
Each novel within the series is a self-sustaining story, according to the Goodreads website. There is a beginning and an end to each book, they do not continue onto the next one in the series. However, the plot of each book is dependant on the book before it in the series. Therefore, the books make more sense when read in order.
There are more books needed to end the series, but the number of books is not known yet. Of the nine listed, the latest one, Shiver of Light, was published in 2014. Laurell K. Hamilton is well-known for her other series, the Vampire Hunter Series, staring the character Anita Blake. The Merry Gentry is much smaller thus far than the Vampire Hunter Series.