You never know where danger may come from...

6.45am. A sweltering London rush hour. And in the last 27 minutes, seven people have been murdered.

In a series of coordinated attacks, seven men and women across London have been targeted. For journalist Famie Madden, the horror unfolds as she arrives for the morning shift.

The victims have one thing in common: they make up the investigations team at the news agency where Famie works. The question everyone’s asking: what were they working on that could prompt such brutal devastation?

As Famie starts to receive mysterious messages, she must find out whether she is being warned of the next attack, or being told that she will be the next victim...

‘Simon Mayo is clearly a force to be reckoned … Smart and tense, and there are  some highly ingenious twists’ The Times

'Mayo proves unfailingly good at dialogue' Readers Digest

"Knife Edge is the best kind of thriller - step by all-too-plausible step we're sucked into frantic, breathless action... Perfect." Lee Child

‘Another gripping read - you'll be on a knife edge’ - Daily Express

'A cracking thriller' Bella Magazine

'An edge-of-your-seat thriller' Yours Magazine

‘A cracking novel straight out of the day’s headlines, which keeps piling on the pressure before a knockout finale’ - SHOTS

'A brilliant thriller full of suspense' Closer 

'Tense, taut and splendidly twisty' Heat

'A gripping – and decidedly dark – debut thriller’ Daily Express`