The book deals with a particularly complex and controversial subject: the Trinity. This is an introduction to the subject. The topic is covered in some 150 pages. Christians struggle to understand this transcendent notion of the Trini-ty (Father ‒ Son ‒ Spirit) because it goes far beyond what humans can imag-ine. The Bible presents a triune God in action in creation and redemption. It is this notion that the author introduces to his readers.