Strangely there is no current books for the state of the art Linux networking.

Here are a few and far between books on Linux networking but they are seriously outdated [1][2]. I think it's about time someone write an authoritative book on Linux networking in the light of the recent changes on Netfilter, bpfilter, eBPF and LXC container.

[1] Linux Kernel Networking: Implementation and Theory, 2013

[2] Linux Routers: A Primer for Network Administrators, 2nd Edition, 2002