I think Moria has some bug or just I'm the one who can't escape...
It happened like this, I went to Moria and find the secret path to the Door of Moria, I entered, beat some Goblins, then in a room where placed three tombs, one of them have a skeleton of Dwarf holding a book in front of it, I took the book, it's a copy of "Play Dwarf", then I lost in Moria while reading it(cute, I'm an elf BTW), then I must find a way out, I tried couple of hours, and use my arrows as mark in the maze like dungeon, finally, I found a gate which said "retreat battle", I press F key and lost in reading the book again, if I press Tab key, nomatter I surrender to orcs(I think Moria is ruled by Goblins or my memory deceived me) or not, I lost the book just found.
So is this a bug or I don't find the right way?
It's a bug, will be fixed in first patch. For now Moria is too perilous for good characters