Slither Series by John Halkin

From his first terrifying, bloody encounter with them Matt Parker knew they were lethal to the human race. Out of the murky sewers they suddenly attacked —snapping, biting, ripping at his flesh. After the first sensationalism had died down, the newspapers lost interest ... the experts dismissed them as no more dangerous than ferrets ... people started to forget.But Matt knew different... moreFrom his first terrifying, bloody encounter with them Matt Parker knew they were lethal to the human race. Out of the murky sewers they suddenly attacked —snapping, biting, ripping at his flesh. After the first sensationalism had died down, the newspapers lost interest ... the experts dismissed them as no more dangerous than ferrets ... people started to forget.But Matt knew different. All the time they were growing in size and numbers — and they preyed on living flesh!For when they returned — slithering out of village ponds, swimming pools, even bath pipes — the fate of the British population was sealed.And there was no more horrifying way to die .... less

A boy accidentally fallen overboard... a child in a paddling pool... an old man taking a daily swim... These are their first prey.They arrive originally in ones and twos - deadly jellyfish eager to feast on human flesh. Attaching themselves lovingly to their victims' bodies. Then stinging... paralysing... feeding.Nothing can stop them - not even on dry land. Thousands surge over the beaches... fight their way inland up creeks and rivers.. moreA boy accidentally fallen overboard... a child in a paddling pool... an old man taking a daily swim... These are their first prey.They arrive originally in ones and twos - deadly jellyfish eager to feast on human flesh. Attaching themselves lovingly to their victims' bodies. Then stinging... paralysing... feeding.Nothing can stop them - not even on dry land. Thousands surge over the beaches... fight their way inland up creeks and rivers... leaving behind their telltale smears of luminescent slime.But the final horror starts when they begin to breed. For now their young appear in reservoirs and storage tanks... slipping through drainpipes and water taps... And humankind faces ghoulish extinction. less

When Ginny first spotted the beautiful moths, she felt sure they were welcoming her to her new cottage... But by the time the lethal caterpillars arrived, she knew she was very, very, wrong. Huge, green and hairy, they ravenously preyed upon flesh - burrowing in the softest, most unprotected parts of the human body. And their first victim was Ginny's own sister, but she was only the first...