How do I add a link to my Home Page in site navigation?

I have a. very annoying problem. I've built a simple site with just four pages: Home, Books, About, and Contact.

By default, the navigation links in my site header DO NOT include a "Home" link. Image attached. This means that when somebody goes to, let's say, my "About" page, they don't have a way to get back to the home page without using the back button in their browser.

I've tried to follow the Squarespace tutorials on this but, annoyingly, they all involve adding a link to a new page. I don't want to create a new page. I just want to have a Home link in the navigation block.

I also tried looking under the "Pages" options on the left side of the design view but I don't see anything helpful there. Annoyingly, my home page does appear as "Unlinked" while the other three pages appear as linked.

This should be so simple. What am I missing? TIA for your help