It is quite an OK
book for
beginners.
I was disappointed with it because the tools he uses can be seen in Daily comic strips. So I don't think Mort Walker researched Worldwide
comics. The examples are Limited not vast as you would expect in a "Lexicon".
Also it doesnot go into details about Technique and only gives you bare essentials. Will Eisner's Comics & Sequential Art is a better book for beginners and professionals alike.
You could finish reading Lexicon in a day and start drawing your own strip immediately. Recommended as a Quick Fix.