https://help.evernote.com/hc/en-us/articles/208313478-How-to-delete-notes-and-manage-your-Trash Under Delete notebooks MAC AND WINDOWS
Right-click the notebook you'd like to delete
Select Delete Notebook... from the options list
I'm new to Evernote and I'm trying to delete a notebook went to the Q&A and tried what it said but when I right clicked on the notebook there is no delete button.