It's easy to find cold brews on summer days, but here's a twist: a journey back to the alcoholic beverages that people drank thousands of years ago.

Patrick McGovern, a renowned scientist and passionate lover of fermented beverages, brings the history of ancient brewing alive with this fun, tempting and thought-provoking book, Ancient Brews: Rediscovered & Re-created. McGovern is director of the Biomolecular Archaeology Project at the University of Pennsylvania in Philadelphia. For more than three decades he's been a pioneer in archaeological chemistry - a field that combines old-school fieldwork with cutting-edge technology such as mass spectrometry and DNA analysis.

The new lab tools are able to identify the chemical makeup of astonishingly small beverage traces that remain on ancient artifacts, such as the stains on beverage containers found in the Egyptian pyramids. McGovern and other researchers then match the chemical fingerprints to various grains, fruits and spices, and come up with a kind of reverse recipe, brought to life thousands of years after the original beverage was originally consumed.