Peter Derrick's book covers the "Dual Contracts" era of subway construction in New York, when numerous lines were built between 1910 and 1931 by the IRT and the BRT /BMT. Derrick focuses on the interactions between executives of the then-existing subway companies and municipal politicians. Only a few paragraphs cover the "Independent" subway system, which was built after 1931.Endnotes, bibliography, etc., comprise 155 pages of this book, or nearly a third of its pages. There are eight maps and 24 period photographs. There is nothing in this book about station design, track layouts, operating procedures, or rolling stock. In fact, the book ends when construction began. It was a worthy endeavor of historical research to document the political deal-making of this period, but some readers may be disappointed that the author's interest was solely in the back-room political gamesmanship that preceded construction