"The Voice of your Soul" is a book written by Lain Garcia Calvo that explores the principles of the metaphysical and quantum world and how they can be applied to achieve what you want in the physical and material world. The book delves into the connection between our inner voice, or soul, and our external reality, providing insights and strategies to align our thoughts, beliefs, and actions with our desires. It offers a unique perspective on manifestation, personal growth, and the power of the mind in creating the life we desire.