These are my top recommendations for specifically the collapse of Yugoslavia:

• Sabrina Ramet, Balkan Babel: the Disintegration of Yugoslavia from the Death of Tito to the Fall of Milosevic
• Laura Silber and Allan Little, Yugoslavia: Death of a Nation

I would also recommend to the following works for a broader understanding of Yugoslavia, each of which cover the collapse in their later chapters:

• John Lampe, Yugoslavia as History: Twice There Was A Country
• John Allcock, Explaining Yugoslavia
• Vjekoslav Perica, Balkan Idols: Religion and Nationalism in Yugoslav States

Lastly, I would advise HEAVILY against Robert Kaplan’s Balkan Ghosts. It’s a very problematic work that perpetuates the “ancient ethnic hatred’s” thesis that Yugoslav specialists have thoroughly disproven.

Hope that helps!