Please note Ruins is a direct sequel to Sentinel and if you have read book one in this series it is entirely possible that this review might contain the odd spoiler or two. Don’t say you haven’t been warned. In his desperate search for answers about the Sentinels, an ancient society of demon hunters that his parents belonged to, fifteen-year-old Nicholas Hallow is tipped into a fresh nightmare of terrifying monsters – and even more sinister humans – which threaten to send the world spiralling into chaos. Can Nicholas track down the mysterious girl who holds the key to their fate?  Ruins picks up events not long after the end of book one. Nicholas Hallow is starting to settle into his life as part of the Sentinels. He is beginning to accept his place as part of a secret society tasked with protecting all humanity. Nicholas still has lots to learn however and so some on the job training is required. Working as Sam Wilkins assistant is the best way to learn, the old man has a knack for locating evil in all its many forms. I was glad to see Sam appear again, he was probably my favourite character from…