No, zombies can not read. It is one of the first things that goes when their brains degrade. The problem occurs when someone has already read the book becomes a zombie. Luckily not many people who read the book turn into zombies, AND they have very basic forms of communication, so they cant really share the info.
All I can remember off the top of my head about Rhodium(I am a chemistry student), is that it is a transitional metal, and is a very expensive precious metal. I think it is more rare than Titanium and Platinum. I should research its zombie killing properties more(I am sure there is a chart of good zombie metals in one of the indexes of my books), and then make a katana out of some....
This is my only gun:
Though my dad has a gun safe, and I know there is an AR-15 in it, so if they are already dead/zombies I will get more guns.