What will it take to tell the truth when your life depends on a lie? This is the question a blood spatter expert grapples with when she realises she sent the wrong person to prison. The 20th novel from NYT bestseller and Costa-shortlisted crime writer Denise Mina, for fans of Tana French and Elly Griffiths.

'Authentic, compelling and written with wit so sharp it'll cut your fingers. Once again, Denise Mina shows the rest of us how it's done' ERIN KELLY

Blood washes off, but guilt stains . . .

A year ago, a father and his fiancee were brutally stabbed in their opulent London townhouse, sparking the most high-profile murder investigation in recent history. Blood spatter expert Doctor Claudia O'Sheil's evidence put the killer behind bars-or so everyone believes. But since the trial, recently widowed Claudia has learned a horrific truth. Her evidence and her testimony were wrong. And someone she knows made sure of it.

Now, as she takes the stage before the elite of London to give a career-defining speech, Claudia faces a devastating choice. Protect her children and her livelihood with her continued complicity, or blow the whole conspiracy apart and reveal the truth- not only is the real murderer still out there, but they're in the audience.

As Claudia steps toward the microphone, she revisits that fateful night. What really happened? And what speech will Claudia give?

A taut, intelligent suspense novel for fans of Val McDermid, Elly Griffiths and Tana French, The Good Liar is about power, class, and the lengths we're willing to go for family.

Praise for Denise Mina
'Crime-writing royalty' IAN RANKIN
'A delight' ANN CLEEVES
'Highly original' THE TIMES
'Darkly brilliant' OBSERVER