need C crash course book

[ref]

Hi All,

So I have been tasked with the impossible (as usual) and I need to write
an apache module, and given what it needs to do, I want to compile it
for maximum speed run time. I have Nick Kew's book "The apache modules
book", and now need to get a crash course in C. I was wondering what
books you guys would recommend, other than the Kernigen & Ritchie book
which I have. I guess I am looking for a 'best practices'/tutorial kind
of book. I have solid PHP/JS,  reasonable Perl, and passing experience
with Java/Python (just not enough time behind the wheel for them to be
solid). 
Any pointers anyone ?(no pun intended ;) ...and yes, I know this will be
a crunch, but I _love_ a good challenge and something to sink my teeth
into)

Richard
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ref <tbs-Gb/NUjX2UK8 at public.gmane.org>