I just got the boxed set (all 3 books with DVD) and it was about $70 bucks.
If you are relatively new to guitar, Id go with the first book ($16.00) and work through it. Their is a lot of info in their so don’t be daunted, just take it one step at a time !
Another good idea is to get hold of a song book that contains a lot of songs you like and know reasonably well (like you can whistle the melody) and this can be really helpful!