Where religion is an integral part: Rebecca Brammer's YA book The Year of Plenty. I know Rebecca from an LM Montgomery discussion list, so I know she's a devout CHristian. So are her characters, not too surprising since the book (first of a series) is based on her grandmother's childhood. What lets me, as a non-Christian, enjoy the book is that the religion is a large and essential part of the characters' lives and upbringing, but never preached at the reader.