Outlander to me.
The Guernsey Literary and Potato Peel Pie Society is a novel told in letters and telegrams back and forth between characters (it took me back to my high school reading of The Spoon River Anthology). This is a delightful read, though it does contain some intense WWII details. It is a perfect book for back-to-school busyness when you are lucky to find a few minutes to read here and there.
I'd highly recommend it. In fact, I think Adrienne would really like this book. Stop by her page next, to get more great recommendations!