The Lost & Found, by Katrina Leno

Frances and Louis have been online friends for years, since they met in an online support group for trauma survivors. They know each other's secrets and innermost thoughts -- and everything they've lost along the way -- but they've never met in person. When Frannie finds out that her mother, whom she thought had abandoned her and gone to Florida, was actually institutionalized, she begins to question everything she knows about herself and her family. As a soon-to-be senior, Louis is also questioning what the future holds for him and whether he can bear to part from his twin sister to follow his own path. The two set off from opposite sides of the country and converge on Austin, Texas to meet each other and to find what might be answers.
The plot of this tale feels familiar, but the relationship at the heart of the book is much richer than anticipated. Frannie and Louis build something that is larger than friendship, and more delicate but longer-lasting than first love. The author also has a very creative take on emotional loss by having Frannie and Louis prone to physical loss (a tennis racket, $20, sunglasses, a bill for a coffin) in mysterious ways. When they start to find each other's lost items, they also begin to help each other find ways to move past their emotional loss as well. A great book for readers who like humor and an optimistic ending, but aren't afraid to cry along the way.