"When Heaven Invades Earth" is a book by Bill Johnson, a prominent Christian leader and pastor. The book explores the concept of experiencing God's presence and power in everyday life, emphasizing the belief that heaven can manifest on earth through faith and spiritual practices. Johnson encourages readers to seek a deeper relationship with God and to live out their faith actively. The central theme revolves around the idea that believers can bring about divine transformation in their communities. By understanding their identity in Christ and embracing the gifts of the Holy Spirit, individuals can impact the world around them, reflecting God's love and purpose.