Bright Air is the latest from well known writer Barry Maitland It's a standalone - not part of the Brock and Kolla series.
The synopsis:
On a cliff-face in New Zealand, two men fall to their deaths. Four years before, another member of the same close-knit group of university climbing friends, the bright and beautiful Luce, also died, supposedly in a climbing accident. As the circle of friends dwindles, two of the surviving members, Luce's ex-lover Josh and best friend Anna, see a new significance in her death. In an attempt to uncover the truth, Josh and Anna follow the trail to Lord Howe Island, where they begin to suspect an island-wide conspiracy to hide what really happened. Had Luce uncovered a dangerous secret - one that was still worth killing for?
The opening line:
"Love casts a strange light over everything. I recall the moment precisely, as if watching a loop of dazzling film played at half speed."