It hasn't been made into a film series or a TV Show yet, it's just been comissioned for one. If you check out Rachel Caine's official website you'll see. There are no plans to make it into anything just yet, only that it's been given the green light to be made into either a film series or a TV Show someday. It could take a few more years yet for it to happen.
HELLO PEOPLE. I HAVE AN IMPORTANT ANNOUNCEMENT TO MAKE.
Listen up. How many of you thought it would be cool if there were a movie or a tv show for this book? Well, Rachel Caine is making a web tv series! Isn't that exciting? But it will only be made if they get enough funding, so everyone needs to pledge to donate some, please!!!! Here is the link to the website, go pledge! link
Well at the end of this year they are doing a web series.... they say that it should be public when readers have finished the last book 'Daylighters'... Hope this helped :)