The Virtual Library currently has 6 copies of the book. Because there is a limited number of copies, we do not recommend using the Download (offline) option. The Download (offline) checks out the book for an extended period of time to just one person. Select the PDF Full Text link to read the book online. The PDF Full Text option frees the book 30 minutes after the student leaves the system. It also allows students to save up to 60 pages at a time to their computer. To save a section of the book to your computer, while in “PDF Full Text” view, select a chapter to read, click “Save Pages” link at the top of the screen, select pages to be saved (up to 60 pages at a time) and click “Save PDF” button to save selected pages.