Birkbeck College

I went there when I was preparing the IELTS examination and the library helped me a lot as It was a quiet place with full of informations.
First, the reception is really patient and try all they can to make things easy for us.
You can borrow books for three weeks but what is good to know is that it never costs you more if you have a maximum delay of one week after the deadline.
They have computers with a special software that makes your search more productive by giving you the books which are maybe interesting for a particular subject.
They have also lots of copying machines and the cost of the copy is only 5p.
The opening hours are nice as it closes at 22h and it’s open on Sundays too.
There is also a coffee near the entry for the library so you don’t have to go outside for a break.