Just one day - Gayle Forman

From the author of the international bestseller, IF I STAY, now a major film starring Chloe Grace Moretz.

When sheltered American good girl Allyson "LuLu" Healey first meets laid-back Dutch actor Willem De Ruiter at an underground performance of Twelfth Night in
England, there's an undeniable spark. After just one day together, that
spark bursts into a flame, or so it seems to Allyson, until the
following morning, when she wakes up after a whirlwind day in Paris to
discover that Willem has left. Over the next year, Allyson embarks on a
journey to come to terms with the narrow confines of her life, and through Shakespeare, travel, and a quest for her almost-true-love, to break free of those confines.

Perfect for fans of John Green, Just One Day is the first in a sweepingly romantic duet of novels. Willem's story - Just One Year - is out now.