You may want to read “End the Fed” by Ron Paul (available in paperback). It chronicles and exposes the national consequences of Fed manipulation. An eye opening book for sure.
I heard Ron Paul say the fed has never been audited but I also saw a video of a hearing in the House discussing the audit in 2008 showing 8 Trillion gone - unaccountable and one in 2012 where now 16 Trillion that simply gone.