Deep Cover

A Harry Vicary Mystery: the second novel in a brand-new crime series set in London from the author of the Hennessey and Yellich mysteries.
When the snow thaws on London's Hampstead Heath after a harsh winter, a ghoulish discovery is made that marks the start of a very dangerous case for Detective Inspector Harry Vicary and his team.
A body of a man is found on top of a shallow grave containing the battered remains of a young woman. He appears to have frozen to death, but what is his connection to the remains below? Vicary's investigation leads him deep into London's criminal underworld.