October 2022: Things look bleak for Bayer Leverkusen. The team struggles in the Bundesliga relegation zone, when a new coach, Xabi Alonso, takes over their fate. June 2024: Bayer Leverkusen concludes the 2023 / 2024 Bundesliga season as German champions and DFB-Pokal winners, securing the domestic double while losing only one game allseason. Shortly afterwards, Spain claims victory at the UEFA European Championship in Germany. What led to this remarkable transformation? What tactical innovations are behind Alonso's dynamic and dominant style? What influential methodologies from Spanish football form the foundation of his philosophy? And why do coaches from the Basque Country? In his book, Tim Stegmann weaves these influences into an engaging tactical portrait of Bayer 04 Leverkusen's championship-winning team and the exceptional leadership of their coach: Xabi Campeón!