Grim Fantasies - The Dream World Chronicles, #3

The race is on to find the sleep thorn, a magical weapon that can put anyone in an eternal sleep. Alex wants it to eradicate her enemy-her enemy wants it for the same reason. When the new guy at the Circle promises to help Alex find the weapon, and a prophetic dreamer discovers its exact location, it seems like a done deal. But in the dream world, things are rarely what they seem, and on Alex's journey, betrayals and nightmares lurk in every corner.