Field	Type	Null	Key	Default	Extra
id	int(11)	NO	PRI	NULL	auto_increment
book_id	int(11)	NO	MUL	NULL	
page_number	int(11)	YES		NULL	
is_pdf_page	tinyint(1)	YES		0	
page_or_file	varchar(100)	NO		NULL	
snippet	text	YES		NULL	
full_content	longtext	YES		NULL