create table member
(
	id integer not null primary key autoincrement,
	name varchar(255) not null,
	email_address varchar(255) not null
);


create table book
(
	id integer not null primary key autoincrement,
	title varchar(255) not null,
	author varchar(255) not null,
	genre varchar(32) not null,
	constraint ck_genre check (genre in ('Unspecified', 'Fiction', 'NonFiction', 'HistoricalFiction')) 
);


create table reading
(
	member_id int not null,
	book_id int not null
);


create table category
(
	id integer not null primary key autoincrement,
	name varchar(255) not null,
	parent_id int
);


create table category_book
(
	category_id int not null,
	book_id int not null
);