For review at http://newtownreviewofbooks.com/ this is the second Catherine Berlin book from English / Australian writer Annie Hauxwell
From the Blurb:
Treachery becomes a habit.
London is in the grip of a stifling heatwave. The parched city has slowed to a claustrophobic shuffle and there's no end in sight. Heroin-addicted investigator Catherine Berlin suffers while working the nadir of investigations: matrimonial.