Even when I was little, my mom and dad taught me some words in sign language so that i could comunicate with them a little even though i coudn't talk. Words such as: Please, Thank you, more, ect. But i didn't want to really learn sign language until the age of 13.
Firstly, I was seeing alot of shows and movies that had a bit of sign language in it (The Miracle Worker). Secondly, My dad told me that my Aunt was deaf and couldn't hear almost anything. And thirdly, i thought that it might be useful in the future. Ihope this book is helpful to you. thanks :-)