Book Title: House Clock #4 : Ghost In Mirror
ISBN: 9781848128163
By Author(s):BELLAIRS JOHN
By Publisher:BONNIER ZAFFRE
Format:PB
Mrs Zimmermann is at a loss - she still hasn't regained her powers from her last encounter with dark magic and Uncle Jonathan and Lewis have left for the summer to travel around Europe, leaving her and Rose Rita bored and lonely at home. That is until Mrs Zimmermann keeps on seeing visions and shadows of her old magic teacher, Granny Wetherbee, who is trying to contact her from beyond the grave.
Mrs Zimmermann and Rose Rita set off to Pennsylvania to solve the mystery and in doing so travel back in time to Granny Wetherbee, who tells them that they must save a good wizard, Grandpa Drexel, who is destined to die for a wrongdoing he didn't commit.