https://www.amazon.com/Positioning-Battle-Your-Al-Ries/dp/00...

https://www.amazon.com/22-Immutable-Laws-Marketing-Violate/d...

Seth Godin is another author well worth reading:

https://www.amazon.com/Seth-Godin/e/B000AP9EH0

And a few others:

https://www.amazon.com/Crossing-Chasm-3rd-Disruptive-Mainstr...

https://www.amazon.com/Kellogg-Branding-Marketing-Faculty-Ma...

https://www.amazon.com/Differentiate-Die-Survival-Killer-Com...

https://www.amazon.com/Confessions-Advertising-Man-David-Ogi...

And, of course:

https://www.amazon.com/s?k=vaynerchuk

There are no magic pills though. The best thing is to read and learn from a lot of perspectives and then start to navigate the waters you happen to be sailing. No two markets or products are going to be the same. In fact, the same product will require a different based on where it is in the adoption/maturity cycle.

When it comes to Management, I have to second vellum's advice and go with Drucker:

http://www.amazon.com/Effective-Executive-Definitive-Harperb...

Classic (Mad Men era) of Marketing is ruled by Ogilvy:

http://www.amazon.com/Confessions-Advertising-Man-David-Ogil...

However, I cannot stress enough the role of analytics in modern business strategy/marketing and Kaushik's book is the best:

http://www.amazon.com/Web-Analytics-2-0-Accountability-Centr...