16 Emergency Landings Proving Flat Earth, written by Eddie Alencar, is a book that argues for a flat-earth model by analyzing flight paths and emergency diversions of commercial airliners. The book claims that these specific incidents, when plotted on a flat-earth map rather than a globe, make more logical sense in terms of distance and diversion routes. The book uses over 16 examples to suggest that flight paths often appear "straight and level" on a flat, stationary plane, which proponents argue contradicts the necessary adjustments for a curved, rotating sphere.