Hearing Mexican Fiance Learning Sign

An About visitor wrote:
I am trying to look for Spanish Sign Languages books any where in the store or on the internet.. I could not find the right website to look for.. My fiance is a Mexican and he is hearing... He knows sign languages. We would like to take a big challenge to learn Spanish Sign Languages. Do you know where I can find the book to learn Spanish SL?

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I referred the visitor to the article on Spanish Sign Language.