Author: Hardy, Vashti
Interest age: from c 8 years 
Published 02/05/2019 by Scholastic in the United Kingdom 
Paperback | 448 pages
Winner of the Blue Peter Award 2020.
  A mind-bending adventure from the author of Brightstorm!
A year after the death of her older brother, Prue Haywood's
family is still shattered by grief. But everything
changes when a stranger arrives at the farm.
A new, incredible technology has been discovered in the city of
Medlock, where a secretive guild of inventors
have developed a way to capture spirits of the dead in animal-like
machines, bringing them back to life.
Prue knows that the 'Ghost Guild' might hold the key to bringing
her brother back, so she seizes the stranger's offer to join as
an apprentice. But to find her brother, she needs to find a way
to get the ghost machines to remember the people
they used to be.
Yet if Prue succeeds, all of society could come apart...
'Hardy has a laser-like sense of what appeals to her readership'
- Literary Review