With the help of random.org I can confirm that the 2 winners of Nightshade by Andrea Cremer are:
Lyndsey (email address starting linzeeloulabelle@...)
Natalie (email address starting natalie23@...)
Congratulations to you both! If you can email me at sarahsreviews at ymail dot com with your full address I will get your books posted to you. Your address will be forwarded to Atom and they will be sending your prizes so by giving me your address you are agreeing for me to pass it on to them. If I don't hear from you within 48 hours then a different winner will be chosen. I'd like to say a massive thank you to Atom for allowing me to host this giveaway for them.