I just finished read the book, “mudhouse sabbath” by Lauren F. Winner. Winner is a Jew that converted to Christianity and this book provides a wonderful bridge between many Jewish religious customs and how Christians can learn from them. It is a good read but not difficult reading. I recommend it as a good devotional or as a study in understanding the ancient Jewish underpinning of our Christian faith.
Note: You can pick the book up at a great price on www.half.com