The book most recommended by ASL teachers is called A Basic Course in American Sign Language which can be found on Amazon or in many book stores.
Here are some links to take you to websites where you can see pictures or videos of some signs.
http://www.handspeak.com/word/
http://www.aslpro.com/cgi-bin/aslpro/aslpro.cgi
If you learn best with lessons and more structure the site below helps ASL teachers prepare their lesson plans:
http://www.lifeprint.com/
American Sign Language Resource Guide
http://www.wiseoldsayings.com/asl-resource-guide.php
A great resource with tons of information covering a large range of topics in the deaf community and ASL:
https://www.wristbandexpress.com/content/Hands-and-Wrists-Learning-American-Sign-Language
An extensive page where you can find a lot of information about various deaf figures throughout history.
http://www.signs2gointerpreting.com/What_Can_Deaf_Do.html
American Society for Deaf Children
https://deafchildren.org/about/core-values/
The American Society for Deaf Children (ASDC) is committed to empowering diverse families with deaf* children and youth by embracing full access to language-rich environments through mentoring, advocacy, resources, and collaborative networks.
Any changes, updates, new information — you can email at enotifier.WSAD@gmail.com.