There are so many great books and videos about raising worms and composting. These are some of my favorites. Hope they come in handy for you, too.
Great Affordable Books:
1) Worms Eat My Garbage by Mary Appelhof
http://www.amazon.com/Worms-Eat-My-Garbage-Composting/dp/0977804518 (This is a very easy read, filled with great information and at this link, you can look inside the book)
2) Teaming with Microbes: The Organic Gardener’s Guide to the Soil Food Web by Jeff Lowenfels & Wayne Lewis
http://www.amazon.com/gp/product/1604691131/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER (This is a great basic science book that provides a wonderful overview for gardeners, including chapters on earthworms, composting, and compost tea)