Once again, this is a great series for readers 11 and up who have enjoyed Eoin Colfer’s Warp books, or who are looking for a slightly younger and more action-based entry into something like the Mortal Engines series by Phillip Reeve. There are plenty of airships, death-defying moments, and relentless clockwork assassins to keep the heart racing, and I’m looking forward to seeing where Sin and his friends go from here.

The rich language, world-building and well-formed characterisation go hand in hand with a cracking plot that races along and has twists and surprises aplenty…It is refreshing and pacey and will have kids wanting more…This is a must have series for schools, libraries nad homes