can anyone recommend some good books about zoroastrianism and mithraism?

I'd like to learn more about the religions/mythologies that shaped the current mythologies of the world.
i already read a history of god and it did not delve into either subjects with much authority.
I've already read the bible. don't assume what i have or have not written. it's intellectually insulting.

A History of God by Karen Armstrong

The truth is the truth, and it cannot be denied even if some other religion found the truth as well, or borrowed it, or "lent" it. It does not matter. Many things of man foreshadow and reflect the truths of God.

May you enjoy God's peace. Amen.

Dear General,

I would recommend that you read the Bible, God's word. "And ye shall know the truth, and the truth shall make you free."