The flying Troutmans
(Book)

When Hattie receives an SOS call in Paris from her eleven-year-old niece, the decision to return to Canada is slam-dunk easy, because she's just been dumped by her boyfriend. But when she arrives back, her sister, Min, is on her way to the psychiatric ward, and Hattie is left to take care of Min's children, Thebes and Logan. When she realizes that this may become a permanent arrangement, Hattie hatches a plan. Without much more than an old address to go on, the three of them set off on a wild road trip to find the kids' long-lost father.