Diana Gabaldon's Outlander is a historical romance with bite. You can't help but adore and relate to the heroine, swoon to pieces over her love interest, and be swept up into the mystery of how a former combat nurse living in the 1940s ends up in 1743 Scotland. Oh, and the sex is pretty great, too.
Love quote: "And I mean to hear ye groan like that again. And to moan and sob, even though you dinna wish to, for ye canna help it. I mean to make you sigh as though your heart would break, and scream with the wanting, and at last to cry out in my arms, and I shall know that I've served ye well."