I'm working on a cover, too. Not entirely happy with what I have. May start again.
The story is set in 1046 AD and these are the opening lines:
‘Thor’s teeth!’ Flane hammered his fist on the mast and gazed at the sky. Above the thatched roofs and smoking fires of Dyflin’s thousand-strong Viking community, the sky was so blue it hurt the eyes. Good sailing weather going to waste. If Oli didn’t move faster than a sick snail, they’d have to wait half a day for the next high tide to take them safely over the sand bars in the estuary. That meant yet another night in Dyflin, and more opportunity for the crew to get into trouble.
A blur of colour and movement caught his eye. Curious, he squinted through the tracery of masts and ropes that blocked his view. A small figure ran heedlessly fast along the wharf. Her fists hiked her skirt out from beneath her feet as she dodged loaded carts and leapt over creels and coils of rope in her path. Long hair, glinting gold in the sunlight, streamed out behind her. She darted towards a ship, veered away and ran toward the end of the wharf where he stood on the Sea Bird.
‘Oh, Christ, no!’ Flane swore under his breath. He was not mistaken; the girl headed straight for him.
The first cover is maybe not clear enough, though I like it. I have just this minute realised that the second cover reminds me of that iconic photo of Nessie the Loch Ness Monster done around 1933, so maybe that would work against it. What do you think?