horizontal Banner Maximenu CK Pro on interior pages

horizontal Banner Maximenu CK Pro works correctly on the home page.
website- amyephron.com
On every interior page the Books dropdown menu does not work correctly.
Example - amyephron.com/books/

When you hover over the Books menu item the drop down menu breaks at item #3 (which should be "White Rose") AND the menu below is hidden behind the banner.

How can I fix these two problems?

Thanks

Hi
this is a layer issue in the page, you can fix it by adding this css
CEd

Thank you.
That fixed it.

p.s. I thought it was a z-index problem, but I didn't know how to fix it.