I'd suggest some general "business strategy" works that will help you understand the context of how/why the very highest level business decisions are made, as well as some works that deal with tying together strategy and tactical execution (which includes technical initiatives).
1. Understanding Michael Porter - John Magretta. http://www.amazon.com/Understanding-Michael-Porter-Essential...
Porter's framework is VERY influential in the business world, and having at least a passing familiarity with his work is important at the higher levels. Going straight to the primary sources (Porter's books) can be a bit daunting as they are big, dry, and academic and not exactly what you'd call "page turners". This book is a fairly solid overview of the key elements of Porter's approach, and a good read before diving into the meat of Porter's works.
2. Competitive Strategy - Michael Porter. http://www.amazon.com/Competitive-Strategy-Techniques-Indust...
3. Competitive Advantage - Michael Porter. http://www.amazon.com/Competitive-Advantage-Creating-Sustain...
4. On Competition - Michael Porter. http://www.amazon.com/On-Competition-Updated-Expanded-Editio...
5. Good Strategy, Bad Strategy - Richard Rumelt. http://www.amazon.com/Good-Strategy-Bad-Difference-Matters/d...
6. Blue Ocean Strategy - W. Chan Kim, Renee Mauborgne. http://www.amazon.com/Blue-Ocean-Strategy-Uncontested-Compet... This book has its critics, but I think it's a worthwhile read. Some people argue against the whole idea of a "blu e ocean" market, but even if the authors aren't 100% right about everything, I think the lines of thinking this book fosters are valuable in a general sense.
7. The Discipline of Market Leaders. http://www.amazon.com/Discipline-Market-Leaders-Customers-Do... I think very highly of this book and the author's approach to strategy. It's not radically different from the Porterian approach in some ways, but I'd say it's narrower in focus and simpler. The big takeway is the idea (which should be obvious, but often isn't) that "you can't be everything to everyone". The authors push a model of choosing a market discipline to appeal to a certain type of customer, and making that discipline the core of your business.
8. The Machine That Changed The World. http://www.amazon.com/Machine-That-Changed-World-Revolutioni... Have you ever wondered what this "lean" stuff is all about? Or why Toyota is so revered by business leaders? Here's a good place to find the answer to those questions.
9. Working Knowledge- Davenport and Prusak. http://www.amazon.com/Working-Knowledge-Thomas-H-Davenport/d... Perhaps the seminal book on Knowledge Management, or at least one of them. If you want to understand the importance of knowledge in an organization, this is a very valuable read.
10. Outside Innovation - Patricia Seybold. http://www.amazon.com/Outside-Innovation-Customers-Co-Design...
11. The Future of Competition. http://www.amazon.com/Future-Competition-Co-Creating-Unique-...
12. The Balanced Scorecard. http://www.amazon.com/Balanced-Scorecard-Translating-Strateg...
13. Strategy Maps. http://www.amazon.com/Strategy-Maps-Converting-Intangible-Ta...
14. The Strategy Focused Organization. http://www.amazon.com/Strategy-Focused-Organization-Scorecar...
15. If Only We Knew What We Know. http://www.amazon.com/Only-Knew-What-Know-Knowledge/dp/14516... Another seminal title in the Knowledge Management world.
16. Common Knowledge - Nancy Dixon. http://www.amazon.com/Common-Knowledge-Companies-Thrive-Shar... Another seminal title in the Knowledge Management world.
17. Winning The Knowledge Transfer Race. http://www.amazon.com/Winning-Knowledge-Transfer-Michael-Eng...
1. Michael Porter's Competitive Advantage [0] or Understanding Michael Porter [1]
2. One of the things that really applies well to tech businesses has been Platform Business Model. This book [2] is a good starting point
3. The Lean startup [3] and Hacking Growth [4] round up the tech books that I have benefited from.
3b. Warren Buffet's letters are a classic to learn about businesses and help when you are dealing with CXOs.
4. With these basics in place, I would recommend Stratecherry - the blog and Economist for keeping up with the current developments in the field.
Good luck!
[0] https://www.amazon.com.au/Competitive-Advantage-Creating-Sus...
[1] https://www.amazon.com.au/Understanding-Michael-Porter-Essen...
[2] https://www.amazon.com.au/Platform-Revolution-Networked-Tran...
[3] https://www.amazon.com.au/Lean-Startup-Innovation-Successful...
[4] https://www.amazon.com.au/Hacking-Growth-Fastest-Growing-Com...
FYI, I come from a similar background. Was a techie for 9+ years before switching to an MBA and can personally attest to the materials given above :)