4 Harriet Blue books in order

When Sydney police department sex crimes detective Harriet Blue is called into her boss's office, she never imagined it would be to tell her that her brother is the prime suspect in the brutal murders of three women.

Shocked and in denial, Harry is transferred to Perth to avoid the… show more.

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It's not easy being a good detective - when your brother's a serial killer.

Sam Blue stands accused of the brutal murders of three young students, their bodies dumped near the Georges River. Only one person believes he is innocent: his sister, Detective Harriet Blue. And she's determined to… show more.

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Detective Harriet Blue is clear about two things. Regan Banks deserves to die. And she'll be the one to pull the trigger.

But Regan - the vicious serial killer responsible for destroying her brother's life - has gone to ground.

Suddenly, her phone rings. It's him. Regan.

'Catch me… show more.

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Harriet Blue used to be a detective. Now she's inmate 3329.

Prison is a dangerous place for a former cop - as Harriet Blue is learning on a daily basis.

So, following a fight for her life and a prison-wide lockdown, the last person she wants to see is… show more.