Spawn of the Slime Beast — Guy N. Smith

Forty years ago a hideous, scaly monster roamed the marshes of the Wash, humans its victims, ripping them to shreds and devouring their intestines. Gavin Royle, a young archaeologist's assistant, had finally destroyed it. Its origins were a mystery, the media claimed that it had come from outer space. Now, unbelievably, it has returned, even more dangerous than before. The Royle family are visiting the area and now Gavin must once again hunt down and kill the terrible creature known as the Slime Beast. Sequel to the 1975 title "The Slime Beast"