The dark / Sharon Bolton.

"Once, she saved his life ..now he'll take hers"--Cover.

When a baby is snatched from its pram and cast into the river Thames, off-duty police officer Lacey Flint is there to prevent disaster. But who would want to hurt a child? DCI Mark Joesbury has been expecting this. Monitoring a complex network of dark web sites, Joesbury and his team have spotted a new terrorist threat from the extremist, women-hating, group known as 'incels' or 'involuntary celibates.' Joesbury's team are trying to infiltrate the ring of power at its core, but the dark web is built for anonymity, and the incel army is vast. Pressure builds when the team learn the snatched child was just the first in a series of violent attacks designed to terrorise women. Worse, the leaders of the movement seem to have singled out Lacey as the embodiment of everything they hate, placing her in terrible danger...