Eva Ibbotson's The Star of Kazan
This is more of a middle-grade book than the other Ibbotson books I've been reading--it centers on a little girl who was abandoned in a church as a baby, and has been raised by the two maids who found her (and, to a lesser extent, by the three professor siblings they work for). She's perfectly content, but still imagines that one day her mother will find her--which is exactly what happens, though things don't go at all as she expects. It's all VERY predictable to a modern adult reader, and so it's a little frustrating to read, but there are still plenty of funny, touching, and surprisingly dark moments to balance things out. B/B+.