Relentless

Sinopsis(en Inglés)

No tenemos la sinopsis en tu idioma: se muestra la de la edición original.

To be unstoppable, you keep going when everyone else is giving up; you thrive under pressure; you never let your emotions make you weak. Grover details the essential traits shared by the most intense competitors and achievers in sports, business, and all walks of life. He shows you how even the best get better-- and how you can too.