I like Ruth the best. It's a lovely, simple story about an old Jewish widow named Naomi. Long ago, her husband, her two sons, and her moved to a far country. Her two sons marry local non-Jewish women. Everything seems very happy, for a time. The story picks up where Naomi has lost her husband and her two sons (the story doesn't say, but maybe war?).
She has no one left, and so decides to journey back to her hometown to live with relatives. Her two young, widowed daughters in law (Orpah and Ruth) at first get ready to go with her, but she tells them that she is an old woman leaving to be with her surviving relatives, that the two girls still have their lives ahead of them and should go back to their families. Orpah gives a tearful goodbye, and leaves, but Ruth comes up to Naomi and says that wherever Naomi goes, that Ruth will go, and that Naomi's people will be Ruth's people, and that Naomi's god will be hers as well.
They get to Israel and Ruth goes to work for one of Ruth's relatives (I think a cousin? named Boaz) so that she can provide for Naomi and herself. She is very loving and obedient to her mother in law, as a daughter would be. One night, all the farm laborers are sleeping out in the field and Ruth cuddles in at the feet of Boaz under his blanket. Boaz wakes up with a start, and young Ruth begs him kindly to share just a corner of his blanket with her. (Things were clearly very different culturally than they are now.) Boaz is so moved with compassion for this girl, after all she's done to help Naomi, and now, as she is cuddling at his feet, that he falls in love with her, and eventually they are married.
Boaz and Ruth, and of course, Ruth's adopted mother, Naomi live happily ever after. In the course of time, Ruth becomes, I think, the great grandmother of King David.
It's just such a pretty love story that centers around devotion to family and friends.