Currently reading REC Bishop Ray Sutton's book Signed, Sealed and Delivered: A Study of Holy Baptism, and I have to say I agree with the reviewers here. It is scholarly yet eminently readable, and is serving to correct, clarify and solidify my thinking on baptism and its relation to ecclesiology and soteriology. I highly recommend it, especially to those investigating or new to classical Anglicanism:
http://www.goodreads.com/book/show/8245813-signed-sealed-and-delivered