Completely Online, All the Time

Greater Phoenix Digital Library
Use your public library card to check out an audio or eBook

KidSpace at Internet Public Library 
Homework help, games and activities, links to reading and author websites for kids

Arizona-Sonora Desert Museum Digital Library
Over 9000 images and explanations of plants, animals, minerals, and biotic communities of the Sonoran Desert region.

 International Children's Digital Library

Read books online or upload them to an iphone or ipad. The site contains nearly 4500 full-length books written in 54 different languages.

Library of Congress for Kids
The world's largest library has millions of books, recordings, photographs, maps and manuscripts available to the American people. Log on,  play around,  learn something

 Smithsonian Digital Library
Contains digital publications, collections and objects including online exhibitions, webcasts, digital editions, bibliographies and fact sheets

Library of Congress Digital Collections
Access to the Library of Congress print, pictorial and audio-visual collections