"The Lost World" by Michael Crichton

It is now six years since the secret disaster at Jurassic Park, six years since the extraordinary dream of science and imagination came to a crashing end—the dinosaurs destroyed, the park dismantled, and the island indefinitely closed to the public.
 
There are rumors that something has survived. . . .

This sequel to Jurassic Park was described by one reviewer as "a very scary read."