Below you will find some of my favourite terrapin related websites. I will add more links here as and when I find reliable sites that you might find interesting.
Turtle Guide Book - Here you will find a complete guide to help you care for your terrapin better. Featured incredibly detailed information on all aspects of terrapin care you will not find a better guide anywhere.
Reptile Forums - A great forum for networking with other terrapin and reptile owners. Great for getting your questions answered quickly and picking up other useful hints and tips from people like you.
Turtle Times - Another great terrapin resource site that covers everything about terrapins with some really sound advice. A great free read.
All Turtles - As the name suggests this site has information regarding all different types of turtles and terrapins. A great community to help you further your terrapin knowledge.
Pet Turtle Care - Another great terrapin resource site covering everything from designing a terrapin tank through to an overview of sea turtles. One of the largest terrapin tips websites online.