I received this question:
I was wondering if students needed any other book besides the Lingua Latina book? There appear to be a couple of other books that are part of the Lingua Latina ‘program’.
Here is my reply:
The only other piece I would recommend would be the instruction manual Mr. Ørberg wrote. But, if you are in class, even that book is not necessary.
Here it is if you are interested: http://www.amazon.com/Lingua-Latina-per-Illustrata-Students/dp/1585100501/ref=sr_1_8?ie=UTF8&qid=1437047337&sr=8-8&keywords=lingua+latina
Ignore the other books. I would recommend them for Latin teachers, not students. Lingua Latina is all you really need.