The Holy Grail of web displays, the overlay block creates a big visual impact 

1. Click the link to add the Overlay Block - you can have as many or as few as you like...
2. Choose display height, text colors, content alignment (to better fit over your image), a background color, image and image effect - for example, by uploading a blue image and placing it on a light blue background with a multiply effect - it darkens it just a bit so the text is more readable. 
3. Add your headings and content
4. Add your action items: bookstore links for authors, a centered call to action button, social media icons/links, or mix and match these.