This will explain the basics of LANs in a fun, but very thorough way:
https://www.amazon.com/All-New-Switch-Book-Switching-Technol...
And this one will fill out your knowledge on the routing side, although it is rather dry:
https://www.amazon.com/Network-Routing-Algorithms-Architectu...
And this one will fill out your knowledge on the routing side, although it is rather dry: https://www.amazon.com/Network-Routing-Algorithms-Architectu...