Suggested reading for learning C?

[Joshua Coombs]

So, I'm starting to actually put some code out instead of just 
waiting for someone to impliment my ideas.  Problem is I'm modifying 
what to me is pretty high level C while only just able to read it 
let alone know what I'm actually doing.  Does anyone have a 
suggestion or three for reading material to help get myself up to 
speed?

(For refrence, I'm working on a base proof of concept build of my 
routing engine proposal from awhile back.  Hopefully by the time I 
get it working fully DF will be ready to impliment it.)

Joshua Coombs