The Flying Troutmans by Miriam Toews
Meet the Troutmans. Hattie is living in Paris, city of romance, but has just been dumped by her boyfriend. Min, her sister back in Canada, is going through a particularly dark period. And Min's two kids, Logan and Thebes, are not talking and talking way too much, respectively. So when Hattie receives a phone call in the middle of the night from eleven-year-old Thebes, begging her to return to Canada and help sort out their family, she knows she has to go. When she arrives home, Min is on her way to a psychiatric ward, and Hattie becomes responsible for her niece and nephew. She quickly realizes that she is way out of her league, and hatches a plan to find the kids' long-lost father. With only the most tenuous lead to go on, she piles Logan and Thebes into the family van, and they head south.