What holy book do they use and what holy days do they observe? List and describe at least 2.

They use the holy book known as the Torah.  Their holy days are known as the Shabbats, and they worship on Fridays and Saturdays.

http://www.chabad.org/multimedia/media_cdo/aid/141138/jewish/Shabbat.htm
This is a link to a video about the Shabbats, or holy days.