The Ghost Society by JE Clarkson

The second instalment in the dystopian, Nemo and Co. series. After a foiled biological attack has been pinned on The Cleaner and Ellen, they make a timely escape to a mysterious safe house run by a secret organisation known as "The Ghost Society, a technological resistance group." In an apocalyptic landscape, travelling by river and road, can they reach the safe house before Stella and her foot soldiers catch up with them? With danger and secrets as constant companions on their perilous journey , will they all make it there in one piece, as figures from their past reappear? Their only place of safety will be inside "The Ghost Society."