Answer: endpaper

AnswerCrossword Clue
ENDPAPER

Part of it forms the flyleaf

ENDPAPER

Book decoration

ENDPAPER

Flyleaf component or companion

ENDPAPER
Part of a book
ENDPAPER
Chapter One preceder
ENDPAPERBook sheets
ENDPAPERBookbinder's sheet
ENDPAPERHeavy sheet inside a book's cover
ENDPAPERBook lead