An Expert's Guide to Preparing Espresso, Coffee, and Tea
BoldJava said, "If I needed one book as an accompaniment to a new barista's backroom training, it would be Scott's Professional Barista's Handbook."
In one thin, tightly written book, Rao takes a newcomer through the basics of coffee, espresso preparation, milk management, pour-overs, and press pots. Buy it, read it, lend it out to a friend. Then get it back - great reference.