Here is the Top Ten Must-read Books on International Business that I found very useful and interesting for us in this subject:
1.  Managing Across Borders: The Transnational Solution by Christopher A. Bartlett
-"Growing up to be a Transnational Company from being a mere Multinational, Global or International Company. This is the original book for studying the path to internationalization of businesses-
2.  Competing for the Future by C.K. Prahalad
-"How do the best companies get ahead worlwide, strategically. Has exciting stuff on Honda, Canon, Sony, H-P, Kodak, P&G, Toyota, among many other companies.-
3.  International Business: Competing in the Global Marketplace by Charles W. L. Hill
-"The best possible introduction to International Business Theory and Practice - very interesting read, makes you look it up time and again"-
4.  Rethinking the Future: Rethinking Business, Principles, Competition, Control & Complexity, Leadership, Markets, and the World by Warren Bennis
-"Direct Guru-speak on 21st Century business conditions and environment. Includes all-time great gurus like Prahalad, Hamel, Porter, Handy, Kotler, Naisbitt,  Bennis, Thurow and many other scholars."-
5.  Oxford Handbook of International Business by Alan M. Rugman
-"Another Guru-speak on International business that also doubles up as a succinct introduction-cum-anytime-reference. Read stuff from Dunning, Wilkins, Rugman, Tallman, Yip, Birkinshaw, Westney, Kogut."-
6.  Strategic Innovation: An International Casebook on Strategic Management by Charles Baden-Fuller
-"Valuable and brilliant case studies on some remarkable companies like Honda, Benetton, IKEA, Cartier, Samsung  among many others"-
7.  The Quest for Global Dominance: Transforming Global Presence into Global Competitive Advantage by Vijay Govindarajan
-"Tremendously exciting and fast-paced - captures the new-age spirit of globalization, from the two new Gurus of Globalization. Has  terrific chapters/write-ups on Wal-Mart, Nucor Steel, Dell, Amazon."-
8.  Accelerating International Growth by Thomas W. Malnight
-"Stuff extracted from what they teach at IMD Business School on International Business; excellent and deep in coverage, broad in company analysis covering Nokia, primarily and also others like Nestle."-
9.  Smart Globalization: Designing Global Strategies, Creating Global Networks by Anil K. Gupta
-"A collection of papers from the MIT Sloan Management Review, that provides the original research stuff for studying globalization. Read Kogut, Yip, Birkinshaw, Weiss and other scholars in original"-
10.  Every Business Is a Growth Business: How Your Company Can Prosper Year After Year by Ram Charan
-"For execuitves looking to growing mature businesses, globally."-