Here are a few books you can look into for some great recipes:
Power Juices Super Drinks by Steve Meyerowitz
Smoothies For Life by Daniella Chace & Maureen Keane
The Complete Book Of juicing by Michael T. Murray, N.D.
Power Juices by Penny Hunking & Fiona Hunter
and...if you don't want to pay full price for these, try ordering them from ebay's sister sight, http://www.half.com
you can usually pick them up pretty cheap.