Hostile relations between Iran and Saudi Arabia are partially responsible for the political instability plaguing the Middle East. This book argues that rapprochement between Tehran and Riyadh is possible and it sets out a realistic agenda for managing their intractable conflict. Ibrahim Fraihat interviewed over sixty scholars, policy makers, think-tank experts and activists to gain an clear, all-round view of Iran-Saudi relations since the invasion of Iraq by US troops in 2003. His research shows that effective peacebuilding would be achievable if the participating countries integrated their diplomatic efforts on three levels: government, Track Two and grassroots. The result is a fresh perspective on a dangerous and unpredictable rift that affects not only its primary parties - Iran and Saudi Arabia - but also the future of the wider Middle East. Ibrahim Fraihat is an Associate Professor at the Center for Conflict and Humanitarian Studies, Doha Institute. He is the author of Unfinished Revolutions: Yemen, Libya, and Tunisia after the Arab Spring (2016) and co-author, with Megan Bradley and Houda Mzioudet, of Libya's Displacement Crisis: Uprooted by Revolution and Civil War (2015).