'The Power of Now' by Eckhart Tolle is a transformative book that explores the concept of living in the present moment and finding inner peace. While not specifically focused on relationships, this book offers valuable insights into how our state of consciousness affects our interactions with others. Tolle's teachings on mindfulness, acceptance, and letting go of ego can have a profound impact on our relationships, helping us cultivate compassion, understanding, and deeper connections. Whether you're seeking personal growth or looking to improve your relationships, this book offers profound wisdom and practical guidance.