erDiagram

Admin {
	string devise
}

Post {
	text title
	text description
	string image
}

Book {
	string title
	text description
  integer season
	string ISBN
	integer pages
	t_date issue_date
	int author_id FK
}

Author {
	string first_name
	string last_name
	text description
	string email
}

Countdown {
	boolean is_open
	t_date	start_date
	t_date	end_date
}

Contact {
	string name
	string email
	text subject
	text message
}