Where can I get the latest version of Ubuntu Server Guide(PDF)?

[huisong wang]

Dear Sir:
Recently I have installed the Ubuntu Server 8.04.When I wanted to find some
helpful documents,I found the Ubuntu Server Guide,but its version is
6.10.While I find the latest in the Ubuntu website,I think PDF is better to
read.Can you tell me where I can get the latest version of this book?
Best regards.
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