Resources for ISP Sysadmins?

Okolo Callender asks: "I work for the local telephone company on one of the Caribbean islands, and am the tech in charge of all internet services. Most of my time is spend maintaining our ADSL network. With almost no training, I have become quite good at maintenance and troubleshooting of our network, however I am finding it difficult to find books or online information that tackle tips and techniques more specific to ISP admins. General LAN networking info and raw Cisco documentation is fine, but I would like to find more 'cookbook' style solutions to common ISP-related problems. What books and/or online resources can the Slashdot crowd recommend?"