In act 1 the find a book quest. I've looked at various walkthroughs and none of them explain how to get back to prison level 1 in the arena to get the poison book. Can anyone here tell me how I can get back to the arena?

Thanks.

"Indulge me Pick a dozen black roses. Lay them at my feet. Buried in golgotha. Amongst the dead's elite." ---Prayer for Cleansing