You can add tables to your book. Click on "PressTables" on the menu on the left. Select "Add New Table"
Enter the a name and description for the table. Select the number of rows and columns.
Click the "Add Table" button.
Click on any cell to enter content.
You may use the "Table Manipulation" menu to insert links and images, merge, hide, show, insert, delete or duplicate cells, as well as adding or deleting rows and columns.
Lastly, click "Save Changes"