Feature: slice of $@ in Arguments

Hi, 

First thanks for book,  I have been using it recently and I find it pretty handy.

The second, I think it would be useful to add some example explaining how to access to a slice of $@,  in the section "Arguments" . 
Something like the solution found [here](https://stackoverflow.com/questions/9057387/process-all-arguments-except-the-first-one-in-a-bash-script).

Thanks!