In 1942, Ludwig Prandtl—considered the father of modern aerodynamics—published “Führer durch die Strömungslehre,” the first book of its time on fluid mechanics and translated to English from the German language in 1952 as “Essentials of Fluid Mechanics.” The book was uniquely successful such that Prandtl’s students continued to maintain and develop the book with new findings after his death. Today, the work is available under the revised title “Prandtl—Essentials of Fluid Mechanics,” as an expanded and revised version of the original book with contributions by leading researchers in the field of fluid mechanics.