Aristide Cavaille-Coll (1811-1899) is often referred to as the greatest organ builder of all time. The pipe-organ, being the most complicated musical instrument mechanically and tonally, as well as the most expensive, adds significantly to that world's greatest designation. The talents required to be such a person range far from music-making to advanced physics, architecture, and engineering. That, plus the obvious knack to raise vast sums of money. Cavaille-Coll's Monumental Organ Project for Saint Peter's, Rome: Bigger Than Them All, by Ronald Ebrecht, is the story of the quest to build the...