Nottingham Central Library is on Angel Row, about 250 yards from Old Market Square tram stop, right in the centre of Nottingham. As it's so central, there are many nearby bus stops.
OpenStreetMap showing location of library
OpenStreetMap showing transport links
Google Maps showing location of library
Trent Barton buses (Notts, Leics, Derbyshire)
Stalls, chatting, tea & coffee in exhibition space, flat access via lift.
Talks and some activities in Cecil Roberts Room; access via rising electric platform or 7 steps. Buggies may be left nearby, or brought up if child settled in it.
Wheelchair-accessible toilets: on floor 2, and on ground floor in Contact Centre (up long ramp from library).