Another young adult book, Waterfall is a Christian time travel novel.  Seventeen-year-old Gabi and her fifteen-year-old sister, Lia, travel back in time through an ancient Eutruscan tomb to the year 1332.  The sisters get separated during the time travel, and Gabi ends up in the midst of a clan rival between the houses of Sienna and Florence.  She ends up under the care of Marcello Forelli, a second son, but obviously the man in charge.

Marcello's father suffers effects from a stroke and his brother is also an invalid of unknown causes.

The known black hat is the house of Paratore, but this is Italy in the 14th century, so the politics are such that black hats hide around every column and under some white hats as well.

What I liked here was the history lesson, the neat cross between bold and scared teenagers, the ease that Gabi hid her knowledge of the future (I don't think I would have been as calm and quick-thinking), the tug-of war romance, and the nobility.  I love noble characters.

Because Waterfall is the first in a series called River of Time, this book doesn't have a happy ending so much as a satisfying one.  But that's okay.  I believe book 2 is available….