What does the "invisible man" that McCall reads in "The Equalizer" mean?

Bruce Lee to Denzel Washington

The highlight of this film is Denzel Washington's sharp action. However, he is not a full-fledged action star like Wesley Snipes, who holds a black belt in martial arts. However, when he previously starred in `` The Walker '' (10), he received direct instruction for six months from Dan Inosanto, a friend of Bruce Lee's who worked with him to develop martial arts in the United States. Dan Inosanto is a Filipino-American and a master of the Filipino martial art of Kali. Although Dan Inosanto is not involved in this film, Denzel Washington is familiar with the role of Kali, and he is able to have plenty of fun in this film.

The scene where you can really enjoy this is the scene where "all evil in the world will be completely eradicated in 19 seconds," but the highlight of this work, which is known in Japan as the 19-second scene, is for some reason known as the 16-second scene in America. . It's actually 19 seconds, but 16 seconds appears in the dialogue, so that seems to have left an impression on Americans.

“The Equalizer” (c)2014 Columbia Pictures Industries, Inc. and LSC Film Corporation and Village Roadshow Films North America Inc. / Village Roadshow Films (BVI) Limited All Rights Reserved.

And why 19 seconds? It doesn't seem to have any deep meaning, but this is McCall's habit, and it's like discipline (discipline, training, self-control, following rules). If you can't succeed in 19 seconds, it's a standard that makes you feel your own decline. From this point of view, you can feel McCall's diligent workmanship.

Who is Robert McCall, known for his reading and conversation?