Few questions on log analysis

Hi all,

I'm currently writing my degree dissertation on logfile analysis. I 
was glad to find this list discussing this issue by professionals. 
Unfortunately I wasn't able to find much useful information about 
logfile analysis itself, neither in the internet nor in books or 
scientific papers. The books I found (e.g. Babbin et al: Security Log 
Management) weren't very useful. Thus I contacting you to get some 
answers:
Do you know any book, paper, link etc. where attack signatures in log 
files are described?
Do you know any resource where log-entries are described and/or 
classified?
Which books, papers etc. can you recommend about logfile analysis?

Thanks in advance,
Kai