As of now, the tagline is ITS ONLY MOTIVE IS BLOOD. Writing taglines is almost as hard as writing a blurb or a synopsis. I’ve gone through quite a few.
The only suspect is already dead.
Hot on the trail of a cold-blooded killer.
The footprints lead to death.
Rowan Manory has found himself in a grave situation.
Okay, I made that last one up. Anyway, here’s the latest cover. Still needs some footprints work and maybe a lighter hand.
Gross story: A few weeks back, my cover designer Matt dropped a garbage can on his big toe, leaving him with a black and blue toenail. It remained attached whilst slowly turning a dying shade of brown until last night when it finally came off. Matt immediately photographed it and used it for the vampire nails. Hardcore.
James Scott Byrnside 
There is a haunting mystery to “The only suspect is already dead.“
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“The only suspect is already dead, and — hot on the trail of a cold-blooded killer — the footprints lead to a death whose only motive is blood”
Problem solved.
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“The only suspect is already dead, and — hot on the trail fo a cold-blooded killer — the footprints lead to a death whose only motive is blood.”
Catchy
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That’s practically your novel written right there.
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I was originally going with that or “The only suspect has been dead for forty years.” When they were placed on the cover, both were surprisingly underwhelming with the image.
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Thanks for sharing – looking forward to the release! 🤩
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“The only suspect has been dead for forty years.” Might clash with the cover because the tagline makes you think of a really passive image, a guy rotting inside a coffin for four decades, while the cover is active and implies movement.
“The only suspect is already dead.” is much better, imo. I’d say it’s my favorite of the lot.
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