The Angel and the Demon

Angelique Lawson, a prim, naïve spinster, has an injured, murderous train
robber dumped on her doorstep with instructions to get him healthy enough
to hang. The handsome, persuasive Demon Daugherty stirs feelings she's
never felt in all her twenty-four years, but it's clear he's not to be trusted.
When his true identity becomes known, and she has the opportunity for true
love, her own past comes back to haunt her. It takes a deadly disaster to bring
them together, only to have their plans spiked by a conniving woman intent
on claiming Demon for her own, no matter the method.
But demons are fierce creatures and he risks it all to win Angelique back.
Just when they think they have their happily ever after, a more violent, and persistent, threat comes between them.