The Girl in Wooden Armour by Conrad Mason
Brokewood Valley is a strange and mysterious place. There are old magics under the earth, and dark forces at play. So when Hattie and her brother, Jonathan, arrive to find their Granny missing, they suspect something sinister is going on. Hattie uncovers these unusual powers in the land and is determined to find out the truth. Where is Granny? How is this connected to her mum's death, seven years go? And who exactly is the girl in wooden armour?