Here are some covers from foreign editions of the various books in the Sonja Blue series...
This is the French edition of Sunglasses After Dark. The title translates to The Ecstasy Of Blood. It kind of reminds me of trippy mid-70s sf/fantasy paperbacks.
I'll post more covers from foreign editions. If anyone has any they wish to share, please let me know. I'm pretty sure I don't have all of them.