Assassins creed 2 can not find the last codex not on any map and I'm locked out of codex room and mmemory marker in same room what do I do?

Attached is a link to a walk through. Read through it and you will find it will tell you how to get all the codex's.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.