By default, Workbooks reports are private to the user who created them.  To share a report with another User or User Group follow the steps below:

• Open the report you want to share;
• Click Edit this Report (in the column on the left-hand side);
• Click Sharing Permissions (the padlock at the top of the report);
• Open the Access Permissions tab;
• Click Add Rule.  From the dropdown picklist choose the User/User Group with whom you want to share the report;
• To add more Users/User Groups click Add Rule again;
• To finish, click Save & Close.