Congratulations to Frances Hardinge!
The Costa Book of the Year has been awarded to Frances Hardinge's Victorian murder mystery The Lie Tree.
Hardinge beat bookmakers' favourite, debut author Andrew Michael Hurley's gothic horror The Loney, to win the £30,000 prize.
Receiving the award, a clearly surprised Hardinge said: "It is a fantastic time to be writing children's fiction and YA (young adult) fiction.
"For those people who might be hearing this who think that children's and YA fiction is not their thing please do come and explore - there's a beautiful jungle out there."
The Lie Tree, the author's seventh novel, tells the story of Faith Sunderly whose family have left England for a remote island to escape a scandal.
When Faith's father is found dead under mysterious circumstances, she sets out to uncover the truth and discovers a strange tree that feeds off whispered lies.
Congratulations to Frances Hardinge, we can't wait to hear what our readers think about your book.