You can make changes to your Author's page in the Travel Book Editor with the 'Edit Travel Book' button located under your Travel Book Preview. You can find the author's page at the top of the editor, in the 'Cover & Intro' section, on the right side of the cover page. 

Edit the Author's page

Here you can edit the author names and change the author photos. Change the photo(s) with the pen icon and fill in the names you want in the text bar, then click 'Done'. You should now see the new author information on your Travel Book author's page. 

To see your changes in the Preview, click on 'Save and Preview' at the bottom of the Travel Book Editor.