Answer:

WORM

Answer	Crossword Clue
WORM	Lives in a book?
WORM	Book liver?
WORM	Breakdancing move, with "the"

WORM	Dance done face-down
WORM	Bit of bait
WORM	Malware app
WORM	"Conqueror" in a Poe poem
WORM	"Thou owest the ... no silk": King Lear
WORM	Computer malady
WORM	Computer problem
WORM	Early bird victim

WORM	Computer concern
WORM	Draw (out) craftily
WORM	Early bird's victim
WORM	Low life?
WORM	Apple invader
WORM	Spineless one
WORM	Poe's "The Conqueror ..."
WORM	Night crawler

WORM	Bit of bait from the backyard
WORM	Wriggly bait
WORM	"Inhabitant" of some tequila bottles
WORM	Computer malady (and what can follow the starts of the four longest puzzle answers)
WORM	Computer woe
WORM	Dirt denizen
WORM	Live bait
WORM	Poe's "conqueror"

WORM	Early bird's prize
WORM	Minnow alternative
WORM	Mole's snack
WORM	Early bird's treat
WORM	Type of malware
WORM	Mole's prey
WORM	Tequila inclusion
WORM	Program that attacks computers

WORM	Cad
WORM	Lowlife
WORM	Apple eater
WORM	Fishhook attachment
WORM	Virus kin