Otherworld: Kate and Logan Wolf's Curse, Book 2, (Paperback)

For Kate and Logan Danvers, sixteen-year-old twins of the werewolf Alpha, nothing could ruin a summer faster than the words "supernatural teen leadership conference." They expected a boring week of earnest political discussions and team-building exercises. Instead, in Wolf's Bane, they got a crash-course in real-life leadership, when the camp imploded and the twins and their new friends fled into the West Virginia forest.
Now, in Wolf's Curse, the group has taken refuge in a magically warded cabin only to discover that they might have been safer taking their chances with the demon outside. Trapped in a dark witch's sanctuary, surrounded by hell hounds, the twins will need to hone their leader and team building skills fast. There are battles to be waged and mysteries to be solved. Friendships to be forged in conflict and lost in betrayal. Even romances spark to life amid the turmoil.
It might not be the way Kate and Logan expected to spend their week, but it will certainly be a summer camp to remember.