La búsqueda es masiva. Es comprensible: los estudiantes necesitan acceso inmediato y los libros físicos (en tapa dura) pueden costar entre 80 y 150 dólares.

It was a typical Wednesday afternoon when Alex stumbled upon a problem that would change his life forever. He was a physics student at a small university, struggling to keep up with the demands of his Classical Mechanics course. His professor had assigned John Taylor's "Classical Mechanics" as the primary textbook, but Alex was having trouble finding a reliable source to download the PDF.