A Passion Most Pure by Julie Lessman

She's found the love of her life.

Unfortunately, he loves her sister.

As World War I rages across the Atlantic in 1916, a smaller war is brewing in Boston. Faith O'Connor finds herself drawn to an Irish rogue who is anything but right for her. Collin McGuire is brash, cocky, and from the wrong side of the tracks, not to mention forbidden by her father. And then there's the small matter that he is secretly courting her younger sister. But when Collin's affections shift, it threatens to tear her proper Boston family apart.

A Passion Most Pure will carry your heart from the sophisticated streets of Boston to the green hills of Ireland as men go off to war and women long for their return. Full of passion, romance, rivalry, and betrayal, it will captivate you from the first page.