The Poison Garden Pa by Sarah Singleton

Format : paperback

Condition ; new but minor aging 

Genre : Fantasy 

It is the 1850's, and a young boy, Thomas, leaves his family to be apprenticed to a pharmacist, at the behest of his dead grandmother. He also inherits a magical box from her, which provides him entry into a mysterious garden. But while visiting it, he sees a ghostly vision of his grandmother, who tells him she was poisoned, and warns him that he must find the person responsible, and save her precious garden.