The Mermaid's Knight — Jill Myles

When a car accident takes Leah Sunderland's life, she finds herself in dire need of divine assistance. Her fairy godmother comes to the rescue, but her help comes with conditions. As a fairy godmother, the only assistance she can offer deals with (you guessed it) fairy tales. To win a second chance at life, Leah must play out the tale of The Little Mermaid. Armed with a mermaid tail and nothing else (not even a voice), she has one month to make a nobleman fall in love with her, or else she'll die permanently. But the nobleman she must seduce is a hard, fierce warlord who thinks she's a spy and the mistress of his enemy. Can she win him over before the thirty days are up? Or is she in danger of losing her heart as well as her life?