We Need to Talk About Kevin meets Goodnight Mommy in this outrageous modern family thriller.

Emma and Gregory have a perfect life--a gorgeous home, a successful
design firm--except for their inability to start a family. Following a
traumatic failed pregnancy, they decide to travel to Russia to adopt a
pair of twin boys. From the moment they board the plane in St.
Petersburg, the twins begin to demonstrate perverse behaviour that grows
increasingly ominous, driving a wedge between Emma and Gregory, and
alienating their friends and family. The two brothers show worrying
signs of lack of empathy, and seem to leave behind a trail of disturbing
incidents, and rumours persist as the boys grow into teenagers--even as
Emma continues to cling to her dream of the perfect family. A dark,
violent, and tense novel, Daniil and Vanya shows the bond between parent and child gone horribly awry.

A Book of the Year, Quill & Quire

"Sinister and awe-inspiringly good."--Chatelaine

"Readers will find themselves unable to look away."--Quill & Quire