Best practices?

[eluser]sheldonnbbaker[/eluser]
So I'm porting over an application I made a few months ago from my own framework to CI - so I'm probably gonna have quite a few questions along the way regarding best practices and how to do certain things, so here's the first one I guess:

- where is a good place to have a redirect script for misspelled URLs? e.g, if a user goes to mysite.com/book_for_sale/ instead of mysite.com/book_for_sale/id_number_554542423, I want to redirect them to mysite.com/all_books_for_sale.

Should I make a hook here - 'cause doing a redirect in the controller is kind of 'late', is it not?

Thanks