Secret of the Lantern Keepers

When Edith Averly is sent to investigate a murder at Green Briar Lunatic Asylum, a rambling gothic institution on the edge of the Cornish moors, she's horrified to realise that in order to infiltrate the asylum, she'll have to pretend to be mad herself...Several weeks before her arrival, her beloved father stipulates in his will that his reclusive but strangely-gifted daughters must live apart fro...