Over 145,000 e-books published by academic, trade, and professional publishers; covers all subject areas. Includes tools that allow you to create your own virtual bookshelf, bookmark pages, and add and save notes and highlights. Some titles can be downloaded for short-term use; some allow chapter downloads. Limitations on copying, saving, and printing vary by title, and reset after 24 hours. To locate ebooks without user limitations use the Advanced Search option. Near the end of the page, you'll find a field for "Number of Copies." Select "More Than 1" or "Unlimited."