Verified answer

ok get ready to type or write cause this is a duzy of an answer from a pro.

Go around and the corner and stop when you get to a display case in the middle

of the hall, look to your left and scan the umbrella case to solve another

riddle. Continue with Detective Mode on, there is an armed thug around the

corner so take cover and throw a Batarang at him and take both henchmen out.

Turn around and look up at a ventilation grate on the wall, peel it off using

your Batclaw and go get the Riddler Trophy in there. Continue through the doors

into the Library.

There are six henchmen in the Library, the won't see you right away which gives

you a chance to throw Batarangs at the ones in red jumpsuits on the left. Once

all of the henchmen have been defeated look for a grate on the main floor and

use the Batclaw to take it down and get the Riddler Trophy inside. Grapple the

railing on the third story of the Library.

You don't have much time, open the ventilation grate and enter, go straight and

drop down behind the wall and go to the other side, grapple up into the

ventilation system and continue to another area where you can stand up. Look up

and grapple to get up to the vent and go through it, follow the vents and back

on to the balcony. Throw a Batarang at the rope holding the chandelier, drop

down to the main floor and rescue the hostages.

thats all I can give u after that ur on ur own kid. tata.