This is a custom logo for the front cover a book that's going to be published shortly. I'd give you more details, but the author asked me nicely not to, which is his prerogative. I can tell you this much: it's by a Dutch author. I'll update with more details when I can.
I did the entire cover sleeve (spine, back, front) and there's additional details, but the publisher themselves wanted to handle the fonts, so instead of uploading a blank cover with the logo in the middle (invitation for thievery I think) here's the logo by itself.