I changed a link leaving a page to a new page and now the old page is gone. Have I lost the old page? No, while the old page no longer appears in the Outline mode, the page is still in CALI Author. You can find the page by selecting the Alphabetical view mode from the left hand screen in the authoring mode and then searching for the page by name. You can then include the old page in your lesson by selecting the old 'Book page' as a 'Destination Page' for any other 'Book page'.