--Find the book which is ranked 22nd in weight among all books (for simplicity,
--assume there is just one such book).

select B1.title, B1.year
from yrb_book B1, yrb_book B2
where B1.weight>B2.weight
group by B1.title, B1.year
having (select count(*) from yrb_book) - count(*) <23 and
	(select count(*) from yrb_book) - count(*) >21;


