Hi Alexandra, three very different images that would inspire a book cover. They are images I could imagine inside a book, but not yet the bookcover. So, What 2-3 lines of text would you give the designer to interpret the images as inspiration to design? This often happens for presses that enable you to choose your own covers, see many of the covers for Duke University Press or MIT Press, or Mattering Press.
If you had to go with a press that gives you pre-designed book covers like the Pivot range, what colours and patterns would you go for, what 3-4 keywords would help you to make that decision? Here are some already published: https://www.palgrave.com/gp/campaigns/palgrave-pivot