This is the fourth and final book in the Order of the Spirit Realm Series. If you haven't read the first, Bait, you should start there.
As war with the Spirit Realm monsters draws closer, Bay-Lee becomes desperate to keep Nick with her. If the doorway between worlds is closed, will he be trapped on the other side? It's her biggest fear, losing him. She would love to sail away with him, but Nick refuses to leave while his best friend is in trouble. Mike is still missing. They hear stories about a ghost hunter who vanishes before he's seen. Is it Mike? Is he hunting without them?
Then Bay-Lee learns her sister is in danger. Avery was kidnapped by the Order. They have used magic on her and brainwashed her to kill Mike.
Will Bay-Lee and her friends survive the big battle? Will she lose Nick? And who will sit in Van Helsing's chair in the end?