Two missing backpackers. One vast outback. DS Lucas Walker is on leave in his hometown, Caloodie, looking after his dying grandmother. When two young German backpackers vanish from the area on their way to a ranch, he finds himself unofficially on the case. But why all the interest from the Federal Police, when they have probably just ditched the heat and dust of the outback for the coast? As the number of days the couple are missing climbs, DS Walker is joined by the girl's sister. A detective herself from Berlin, she is desperate to find her before it's too late. Walker remains convinced there is more at play. Working in the organised crime unit has opened his eyes to the growing drug trade in Australia's remote interior. Could this be connected? As temperatures soar, the search intensifies to a thrilling crescendo against the unforgiving backdrop of the scorching Australian summer.

As DS Lucas Walker recovers from his injuries, he heads from Caloodie, Queensland, to the Gold Coast. Surfer's Paradise: a seaside city where gleaming high rises fringe sparkling surf beaches, sunny days lead to wild nights, and criminals and bikie gangs mingle with tourists and dignitaries at five star hotels, clubs and casinos. Before long, Walker is part of a team trying to solve a horrific home invasion and murder that has claimed the life of a young mother and left her nine-year-old daughter fighting to survive. Can he help them find the perpetrators, and keep the young girl safe? Meanwhile, Vandals head honcho Stefan Markovich is in town - and Walker once again finds himself on a dangerous collision course with the drug gang. Weak from his injuries, and grieving, can Walker solve a case that is more shocking than anyone expected, and survive the dark underbelly of Australia's Surfer's Paradise?

A small mining town. A brutal double murder. A killer among them. DS Lucas Walker is off duty. He's supposed to be showing his little sister Grace the Australian outback, on her visit from Boston, but instead they're headed out bush- where Walker's cousin has been mining for boulder opal. Something seemed off when Walker heard that Blair wanted to get out of Kanpara, so he and Grace are en route to bring him home to Caloodie. But Kanpara is in Channel Country, and a major flood is on the way. The atmosphere in the isolated mining town is already tense with rumours of a big opal find, and whenWalker, Grace and Blair wake up the next day they find themselves completely cut off. A deluge far north has run off into the rivers that make up this unique ecosystem, and the roads will be impassable for days. As they take in their predicament, Blair receives a shocking phone call. Two bodies have been found, brutally murdered. The husband is an immediate suspect, but Walker is not convinced. And when Blair is taken in for questioning, the stakes couldn't be higher. Before the water recedes, he must work with local police to uncover the killer in their midst. Can Walker act fast enough to save his cousin, and keep Grace safe? 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.

A DANGEROUS CHASE. A SADISTIC KILLER. DS Lucas Walker is on assignment for the AFP, and it couldn't be more personal. This is his last chance to take down Stefan Markovich - the Vandals leader who tried to have him killed after Walker uncovered his drug operation, and has evaded justice for years. Having tracked Markovich to Berlin, Walker heads to Germany to lure his nemesis out of hiding and into custody. And there is another draw for Walker in he finally gets to see Barbara again. Still dealing with the trauma of her sister's ordeal in outback Australia, Barbara is working her own case - a suspicious death that casts a dark shadow over a peaceful lake colony. Everything about the horrific scene tells Barbara it's murder, and when a second body emerges she realises she is hunting a killer who is watching their victims die in agony. As Walker and Barbara grapple with their cases, they must also face their feelings for each other - amid the constant threats of the world they inhabit. The fourth gripping instalment in the bestselling, atmospheric DS Lucas Walker series is full of shocking twists and thrilling turns - for fans of Jane Harper, Cara Hunter and Chris Whitaker.

A sporting legend. A brutal death. A dark legacy. DS Lucas Walker is back home in Queensland, following the dramatic fallout from his last case. He is just getting to grips with his new role in the small outback town of Katima, when the body of an unknown young man is found hanging from a tree in the park. What at first looks like a tragic suicide soon has Walker's detective instincts on alert, and he and his young partner throw themselves into the case - discovering a connection with an unsolved death. And then a brutal murder changes everything. The victim is Caden Conroy, national cricketing hero, and the dark nature of his death leads to an unparallelled media frenzy. When Walker is sidelined by Brisbane Homicide after being first on the scene, he must go his own way to unpick the deceit and corruption at the heart of these cases. Only then will he know if they are connected, and how - but at what cost? Still reeling from Berlin, and with his own family in freefall, DS Lucas Walker faces one of his toughest cases yet in the fifth instalment of this gripping, bestselling Aussie Noir series - for fans of Jane Harper, Cara Hunter and Chris Hammer.