Alan Little and Laura Silber's Yugoslavia: Death of a Nation is a good introductory text (it was the literal intro text I had for a class on the Yugoslavia break up that I took many years ago). The writers are journalists and the book came out in 1996 (as a companion to a BBC documentary) so bear in mind that it only just covers events through the Dayton Accords, so nothing about the Kosovo War, fall of Milosevic, or any subsequent events. But it is very readable.

Misha Glenny's The Balkans: Nationalism, War and the Great Powers, 1804-1999 is a much larger book with a much longer time frame to cover, but also provides much history pre-breakup, and also gets the reader to the end of the last century.

Edit: it looks like Glenny has a revised edition going through 2011, as well as several revised editions of his The Fall of Yugoslavia, which I have not read.