This book has a little bit of everything I love: romance, humour, action, secrets, as well as a paranormal aspect. It even has a love triangle which I don't actually mind. I normally can't stand love triangles.
Calla, an alpha of her pack of werewolves, the nightshade's, is expected to be bonded to Ren, the alpha of the Bane pack of werewolves. She's not sure if she wants that though. Then comes Shay, a boy who doesn't know of werewolves at first. Shay and Calla have an instant chemistry but try not to show it as Calla is forbidden to be with Shay. I found this element of the book typical of most love triangle books but at the same time it was exciting to read because of the plot that went along with it. A story has to be in the right place for a love triangle and I believe that this one certainly was.
Shay asks for Calla's help in trying to work out who he is, his parents were killed when he was young. I found this interesting to read because of the rapport between the two characters. I liked reading about Ren's obvious jealousy of Shay as well, as he's meant to be Calla's partner. Ren is allowed to date all the girls he wants to but Calla is meant to remain pure. She's forbidden to date anyone, as this is supposed pack behaviour.
Towards the end of the story lots of secrets are revealed. Shay finds a book in his uncle's library which tells the history of the werewolves. From this Calla sees that she has been lied to about certain aspects of her life.
Nightshade has some new adultish/scarier elements to it so I would say over 15's should read it.
I recommend this book for fans of paranormal romance, and secrets that get found out. I gave this book 5 stars because I loved how the story all wove together.