Describe the monster in the novel, The Doom Stone?

From the text:

He saw its skin, a transparent membrane pulled taut over a huge skull, and within the black sockets below its distended brow two narrow, red, murderous eyes.

Where its nose should have been was a ragged, oozing hole. The monster cocked its head as if showing off its neck wound, glared at Jackson as it thrust its twisted fangs out at the window, and began to pound the aircraft with its insectlike extremities.