Which book is this?

Inverting the pyramid (2009) · Jonathan Wilson Inverting the Pyramid: The History of Football Tactics (2008) · Jonathan Wilson

The inverted pyramid (1924) · Bertrand W. Sinclair The Inverted Pyramid (2017) · A.C. Fuller Beyond the inverted pyramid (1992) · Kennedy, George, George Kennedy, Daryl R. Moen, Don Ranly

The great inverted pyramid (2009) · Sam J. Dealey