The Obsidian Mirror by Catherine Fisher

Jake Wilde has finally got himself expelled from his exclusive Swiss boarding school. Despite his many efforts this is the one that has succeeded: taking the role of Laertes in Hamlet rather too literally and substituting a sharpened rapier for a blunted one. Like Hamlet he is driven by the desire to avenge the murder of his father, not by an uncle but by his father's best friend Oberon Venn. Venn became Jake's guardian when David Wilde disappeared on his way home from Venn's estate.

Jake's teacher Wharton is sent to accompany Jake to his guardian's estate to ensure he doesn't abscond en route and together they enter Wintercombe Abbey. This is a house of myth and legend, the Venns are said to be half fairy and the woods around the estate to harbour fairies, not the cute creatures of Victorian imagining but wild and dangerous immortals. Enter also a girl called Sarah who comes from another time, pursued by something resembling a man and by an ice wolf. 

Jake's quest for vengeance and the characters come together in a mesmerising story by a writer who is skilled at taking ancient mythology and giving them a fresh slant. She weaves together fairy lore, the legend of Queen Elizabeth's magician Dr Dee, time travel and Shakesperean revenge tragedy into a story which I can't wait for the next installment of.