Classic books on the art of graphics:

Jacques Bertin. Semiology of Graphics: Diagrams, Networks, Maps. The University of Wisconsin Press, 1983. ISBN 0299090604 (out of print).

Jacques Bertin. Graphics and Graphic Information Processing. Walter de Gruyter, Berlin, 1981. ISBN 3110069016

Edward R. Tufte. The Visual Display of Quantitative Information. Graphics Press, Cheshire, Connecticut, USA, 1983. ISBN 0961392142

Edward R. Tufte. Envisioning Information. Graphics Press, Cheshire, Connecticut, USA, 1990. ISBN 0961392118

Edward R. Tufte. Visual Explanations. Graphics Press, Cheshire, Connecticut, USA, 1997. ISBN 0961392126

Edward R. Tufte. Beatiful Evidence. Graphics Press, Cheshire, Connecticut, USA, 2006. ISBN 0961392177

Robert L. Harris. Information Graphics. A comprehensive illustrated reference. Oxford University Press, 2000. ISBN 0195135326

Books specific on Information Graphics:

Robert L. Harris. Information Graphics. A Comprehensive Illustrated Reference. Oxford University Press, 1999. ISBN 0195135326
Stephen Few. Show me the numbers. Designing tables and graphs to enlighten. Analytics Press, 2004. ISBN 0970601999

Benjamin B. Bederson and Ben Shneiderman. The Craft of Information Visualization: Readings and Reflections. Morgan Kaufmann, 2003. ISBN 1558609156
K. Stuart Card and Jock D. Mackinlay and Ben Shneiderman. Readings in Information Visualization, using vision to think. Morgan Kaufmann, Cal. USA, 1999. ISBN 1558605339
Chaomei Chen. Information Visualisation and Virtual Environments. Springer_Verlag, London, 1999. ISBN 1852331364
Chaomei Chen. Information Visualization: Beyond the Horizon. Springer. 2004 (2nd ed.). ISBN 1852337893
Kerren, Andreas et al. (eds). Information visualization : human centered issues and perspectives. Springer, 2008, LNCS 4950. ISBN 9783540709558
Riccardo Mazza. La rappresentazione grafica delle informazioni (in italian) . Apogeo, Milan. 2007. ISBN 8850310439
Riccardo Mazza "Introduction to Information Visualization". Springer, 2009. http://www.springer.com/computer/user+interfaces/book/978-1-84800-218-0
Robert Spence. Information Visualisation. Addison-Wesley, 2000. ISBN 0201596261
Colin Ware. Information Visualization: Perception for Design. Morgan Kaufmann, 2004 (2nd ed.). ISBN 1558608192
Colin Ware. Visual Thinking for Desing. Morgan Kaufmann, 2008. ISBN: 978-0123708960

Usama M. Fayyad and Georges G. Grinstein and Andreas Wierse. Information Visualization in Data Mining and Knowledge Discovery. Morgan Kaufmann, 2001. ISBN 1558606890

Vladimir Geroimenko and Chaomei Chen (eds.). Visualizing the Semantic Web. Spinger-Verlag, London, 2003. ISBN 1852335769
Chaomei Chen, K. Borner Visual Interfaces to Digital Libraries. (Lecture Notes in Computer Science LNCS 2539). Springer-Verlag Berlin 2003. ISBN 3540002472

Vladimir Geroimenko and Chaomei Chen. Visualizing Information Using SVG and X3D. Springer, 2004. ISBN 1852337907
Stephen Few. Information Dashboard Design: The Effective Visual Communication of Data. O'Reilly Media, 2006. ISBN 0596100167