'Another stunner in the series... A rip-roaring thriller Down Under. Loved the characters and a great plot. Her best yet!' Michelle Teahan

A small mining town. A brutal double murder. A killer among them.

DS Lucas Walker is out bush with his little sister Grace from Boston. They're fetching his cousin Blair, who's been mining boulder opal in Kanpara. The town is tense with rumours of a big opal find, and Blair wants out.

But Kanpara is in Channel Country, and when the three try to leave the next day, they find themselves completely cut off. A deluge far north has flooded the rivers overnight, making the roads impassable. Then Blair receives a shocking phone call.

Two bodies have been found, brutally murdered.

Trapped, with a killer in their midst, Walker is in a race to uncover the murderer before the water recedes. And when Blair is arrested by local police, the stakes couldn't be higher. With all his focus on clearing his cousin's name, will Walker see how much danger his sister is in before it's too late?

The third thrilling instalment in the gripping and bestselling DS Lucas Walker series is full of breathtaking twists and dark turns - for fans of Jane Harper, Cara Hunter and Chris Whitaker.

Readers LOVE Opal:

'Another must read author...you can almost feel the heat and dirt' Reader review, 5 stars

'A great story, a great writer and a great setting - what more could a reader want?' Reader review, 5 stars

'Thoroughly entertaining and gripping story that will keep you guessing until close to the end' Reader review, 5 stars

'DS Lucas Walkers series just gets better and better and she's quickly earned a place on my favourite authors list... An excellent read' Reader review, 5 stars

'Strong characters, a carefully constructed plot with unexpected twists and a shocking conclusion... This is a must read and an excellent choice for any book club. 5 stars' Reader review, 5 stars

'What an excellent whodunnit. Really good fast paced thriller that keeps you coming back for more - I've devoured it in less than day' Reader review, 5 stars