This looks like an interesting book.
Dr. Sproul ranges through a variety of topics, from sacrifices to prayer, symbolism to baptism. One of the most interesting (and probably most controversial) subjects deals with using all five senses in our corporate worship. Old Testament worship was, after all, much more multi-sensory than we are accustomed to as Protestants. Jewish believers of old would experience sites, sounds, tastes and scents that are foreign to us today. Sproul suggests that perhaps the Protestant rejection of elements such as incense is little more than an over-reaction to Roman Catholic worship and something we may do well to recover. The rest of his suggestions are perhaps a little bit less surprising to a Protestant reader, but no less challenging.