Electronic Trading Guide for NASDAQ Level 2

i am starting as on OTC trader on Wall Street, and this book is absolutely juvenile. What the book had to offer was not even basic, and pointless... For example, in reading the level II screen section, they tell you to watch Goldman Sachs (GSCO), but to be careful, due to the fact the the GSCO market maker knows that many traders watch. And that basically summed up the Level II analysis. Bottom line, buy something else, ANYTHING else...