John Murray's work on baptism already mentioned above is short, sweet, and to the point. My wife opened it as a Baptist and closed it as a Presbyterian.
For me, I read the Bible in 90 days for a fall semester class on the heels of doing the Prof. Grant Horner reading plan the prior spring and summer. I was able to wrap my head around the continuity of Scripture and God's covenantal dealings more than I could have ever dreamed (or was even looking for). The whole deal was seasoned with much prayer and many conversations with Presbyterians living nearby.
After I was convinced, I read Baptism: Answers to Common Questions by Guy Richard. That was helpful to capture simple nuances I didn't understand before.
The stuff folks have mentioned are certainly rich treasures on the topic.