Yes get the kettlebells but hold off on the books and vids. You can look up a lot on youtube on kettlebells and workouts so that might save you some money. Maybe after you search through youtube for a while, then you might have a better idea on who else is out there with books that can help you.
Here are some KB sites
and where I got mine:
http://www.muscledriverusa.com/
http://www.maxkettlebells.com/catalo...972af8f6fcb470
https://www.power-systems.com/