Imagining Numbers: (particularly the square root of minus fifteen) by Barry Mazur (Picador, 2004)
An Imaginary Tale: The Story of i (the square root of minus one) by Paul J. Nahin (Princeton University Press, 1998)
Mathematics: From the Birth of Numbers by Jan Gullberg (W. W. Norton & Company, 1997)
A History of Mathematics by Carl B. Boyer and Uta C. Merzbach (Wiley, 2010)
Taming the Infinite by Ian Stewart (Quercus, 2009)
A Concise History of Mathematics by Dirk Jan Struik (Dover Publications)
Visual Complex Analysis by Tristan Needham (Oxford University Press, 1997)
Mathematics and its History by John Stillwell (Springer, 3rd edition, 2010)
What Is Mathematics? An Elementary Approach to Ideas and Methods by Richard Courant, Herbert Robbins and Ian Stewart (Oxford University Press, USA, 1996)
Complex Numbers from A to Z by Titu Andreescu & Dorin Andrica (Birkhäuser, Boston, 2005)
Complex Numbers and Geometry by Liang-shin Hahn (Cambridge University Press / The Mathematical Association of America, 1996)
Indra’s Pearls: The Vision of Felix Klein by David Mumford, Caroline Series and David Wright (Cambridge University Press, 2002)
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