Mango is fun, interactive and easy to use. There are 49 foreign languages to choose from (including Pirate, ARRR!) and 15 ESL courses. Best of all, it is FREE for GCLD customers. All you need is an email address and a library card. Get started with Mango today! This is a paid database through Grand County Library District. When you visit this site remotely, you will be instructed to type in your library card number (whole number, no spaces).