Worship: Reformed According to the Scripture by Hughes Oliphant Old

I read a fair number of books on worship and many of the quote this guy, now I see why.  This short book intelligently explains from the Bible and from history why we do the things we do in church.  Every chapter brilliantly lays out its subject.  Being married to a closet reformed Baptist I did a lot of the classic reading on covenant baptism.  Mr Old's 16 pages on Baptism both explained covenant baptism better than all of them combined, it made me see my need to start catechizing Elena, my 9 year old.  Why we worship on Sunday, why we sing what we do, what's up with communion, why is the preaching so long?  All these questions are concisely and expertly answered.