ARGONAUT BOOKS

It's Christmas, and eleven-year-old Lolli must return to London and break a promise she made to herself - to never again step foot in the Victorian historic house in Spitalfields managed by her family. There, Lolli must face up to what she saw in the house several years ago and make things right for two ghosts - one friendly and one decidedly not - opening her guarded heart to people in both the living and twilight worlds.

Reviews
[...]this is a classic Christmas-time ghost story.
The Bookseller - Charlotte Eyre