The library is in The Forum in Norwich
A library in East Anglia has been revealed as UK's most popular for the third year running.
The Norfolk and Norwich Millennium Library had more visitors and lent more books than any other in 2008/09.
It attracted 1,519,524 visitors and lent 1,124,233 items, including books, DVDs and console games, after improvement work provided extra space.
The figures were compiled by the Chartered Institute of Public Finance and Accountancy (CIPFA).
Derrick Murphy, cabinet member for cultural services at Norfolk County Council, said: "This news is not only a great success for the people of Norwich and Norfolk but is also a tribute to the commitment of our library staff in attracting and retaining readers through their innovative programme of activities and promotions that run throughout the year."
Last year improvement work was carried out as users had complained the ground floor felt cramped.
An extra 177 sq ft (16.44m sq) was created, including a back office area being opened up to make part of the library.
The county council has also installed a new smaller customer service desk and self-service machines, to create more space.