The Deadly Secret of the Boy in the Attic - The Time Stoppers, #1

When Seth discovers a strange boy called Reuben living in a neglected house, he feels sorry for him. But sympathy quickly turns to fear as Reuben reveals a startling reason for needing to hide. Reuben is being hunted by bad angels.  Seth doesn't believe in angels - especially evil ones - but when he witnesses a tragic event at the house, he finds himself caught up in a supernatural battle. Soon, the two find themselves trapped between the human world and the angel world.
Together, they need to work out who to trust and how to survive... because when you talk to angels, you might end up dealing with demons. A compelling fantasy adventure for readers aged 9 years and older, The Deadly Secret of the Boy in the Attic is the first book Emma Dredge's 'The Time Stoppers' series.