You cannot enter the main hall without making an appointment.
To see the famous 'rose main reading room', arrive 30 minutes early for free tickets.
Entry to the library is free.
I have been using it now for 3 months and it saves me so much research. Reduces the need to call and double check every time.
How did I not know these places existed?! Atly's scoring is a lifesaver, now I can finally find THE spot without wasting time Googling my life away.