I just came across this little known book at Amazon, The Cocktail Lab: Unraveling the Mysteries of Flavor and Aroma in Drink by Tony Conigliaro, formerly of Heston Blumenthal's Fat Duck. Although I am just a few pages deep, I can already tell that it is the modernist cuisine for cocktails, the ChefSteps for beverages. Some really exotic equipment is used such as a Homogenizer and a Rotovap which is out of my reach (for now), but the insight into the thought process and the use of ingredients fulfills my curiosity and helps to push me further.
I suspect this book will be on many must-have lists, its very impressive!