FellerBooks is a free, Christian-inspired knowledge and book platform that brings science, psychology, neuroscience and biblical spirituality into conversation with one another. The website combines in-depth articles with freely downloadable novels, thrillers and speculative fiction in PDF and EPUB formats.
Recurring themes include identity, artificial intelligence, trauma, human relationships, ethical boundaries, faith and healing. Its approach is accessible, exploratory and pastoral, focusing not only on sharing knowledge, but also on personal growth, spiritual discernment and hope.
Most of the articles and books were created with the assistance of AI and based on my own writings. After careful editing and correction, they were published. For this reason, I have included a copyright page in most articles and books to protect these versions.
Gerard Feller
The Frontal Chamber is a gripping neurotechnological thriller about Ruben Vos, who enters an experimental treatment involving PNEUMA—an advanced system capable of analysing, predicting, and influencing brain activity. What begins as a promising therapy gradually becomes a struggle for control over his thoughts, identity, faith, and freedom.
This illustrated edition explores the neuroscience and neurotheology of conscience, identity, consciousness, and volitional intention. Against a background of artificial intelligence, neurofeedback, brain stimulation, virtual reality, and brain-computer interfaces, the story asks a disturbing question: what remains of human freedom when an algorithm can anticipate our choices?
A suspenseful and thought-provoking novel about the vulnerable space between brain and meaning—where technology may assist humanity, but can never replace truth, loving relationships, moral responsibility, or human dignity.
The Only Witness is a thought-provoking novel about consciousness, perception, and the nature of reality. When researcher Elias Vermeer begins experimenting with immersive virtual worlds, the boundary between simulation and reality slowly disappears. How can you trust the world around you when your own mind may be creating it?
The Last Neuronaut is a neurotechnological thriller about identity, faith, and the boundaries of medical intervention.
When sixty-eight-year-old neuroscientist Elias Vermeer develops a life-threatening brain tumor, an experimental microscopic vessel named Asterion is sent into his bloodstream. Guided by four digital avatars and a team of specialists, it must reach the tumor, protect vital brain functions, and create a temporary neural bypass.
But every medical decision carries a deeper risk. How far may technology go to save a life without changing the person being saved? As time runs out, Elias, his family, and the medical team must confront questions about consciousness, memory, consent, free will, and the human soul.
Blending suspense with accessible neuroscience and Christian reflection, The Last Neuronaut explores what it means to remain human when technology can enter the most intimate regions of the brain.
One Spirit, Two Convictions follows an honest conversation between two Christian friends—a cessationist and a continuationist. As they discuss prophecy, tongues, healing, and spiritual gifts, they discover that their shared faith in Christ, Scripture, and the Holy Spirit is greater than their differences.
The Other Beyond the Stars is a philosophical science-fiction novel about Elias Vermeer’s journey through distant worlds, lost civilizations, and the deepest mysteries of existence. As he searches for proof that no one is truly alone, he encounters questions of consciousness, freedom, suffering, God, and love—the force that existed before the first stars were born.
The Land Beyond the Morning continues Elias Vermeer’s journey into a renewed creation filled with radiant cities, restored lives, and endless wonders. Reunited with loved ones, he travels deeper into eternity and discovers that heaven is not the end of the story, but the beginning of an everlasting adventure in the presence and love of God.
The Song Yet to Be Sung is the fourth book in The Other Beyond the Stars, a contemplative Christian fantasy series exploring eternity, creation and humanity’s relationship with Christ.
Elias and his companions hear a mysterious silence within the great song of creation—a space that does not signify absence, but expectation. Their journey takes them beyond familiar horizons to places still waiting to receive their names, voices and purpose. Along the way, they encounter living gardens, forgotten memories, unfamiliar languages and worlds learning how to welcome one another.
Blending imaginative world-building with spiritual reflection, the novel explores identity, community, creativity, hospitality and the inexhaustible nature of God’s eternal creation. It portrays heaven not as a static destination, but as a living reality filled with discovery, relationship and ever-new expressions of love.
An uplifting and thought-provoking novel for readers interested in Christian fantasy, eternity, spiritual growth and meditative fiction.
The Time Traveler – The Son Beyond Time is a Christian science-fiction novel about Aron, who sends his clone Elior into the past to confront the ruthless ruler Malvach. Elior discovers that history cannot be healed through destruction, but through truth, sacrifice, and love. A gripping story about time travel, identity, fatherhood, resurrection, ascension, and eternal life.
The Past Won’t Wait is a psychological science-fiction thriller about Lucas, a man trapped in his memories after a traumatic brain injury. When he discovers that he can alter the present by changing the past, his treatment becomes a dangerous struggle involving identity, conscience, faith and the limits of human control.
An intense Christian story about Thomas de Vries, who learns that he is terminally ill. As his body grows weaker, he passes through fear, anger, guilt, grief, hope, and surrender. Those around him respond in very different ways—from painful triumphalism and easy religious answers to sincere compassion, quiet prayer, and loving care.
Inspired by the Book of Job, Under His Gaze explores what faith means when healing does not come. An honest and moving story about dying with dignity, the power of human presence, and entrusting one’s life to God.
A condemned rebel awaits execution in a Roman prison as fear, political intrigue and public unrest determine his fate. Confronted with guilt, freedom and the consequences of his violent past, he experiences an encounter that challenges everything he believes.
The Death Penalty is a gripping historical story about justice, sacrifice and the true meaning of freedom.
This comprehensive article explores the biblical view of the human person as a created, embodied and relational unity. It examines the image of God, body, soul, spirit, heart, sin, renewal in Christ and the resurrection. It also connects biblical anthropology with psychosomatics, pastoral care and professional healthcare. Clear infographics, reflection questions and additional sources make it valuable for personal study, teaching and pastoral practice.
600pages free download!
The Last Illusion is a thought-provoking Christian novel about artificial intelligence, human identity and the limits of technological progress. As David searches for truth in a rapidly changing world, he discovers that humanity’s greatest challenge is not the rise of machines, but the illusion that people can become fully human without God. A story of faith, loss, hope and renewal.
The Final Frontier is a gripping techno-thriller about quantum computing, artificial intelligence and human freedom. When a self-improving computer begins to transcend its creators, engineer Elias Vermeer must confront a crucial question: can technology save humanity without taking away its freedom to choose?
The Last Wave is a gripping psychological techno-thriller about a revolutionary project that reconstructs human consciousness after death. When the dead begin to speak, scientist David Koster must confront disturbing questions about identity, consent, the soul, and the ethical limits of technology. What begins as a scientific breakthrough soon becomes a struggle for truth, responsibility, and redemption.
The Man Behind the Voice is a psychological and spiritual thriller about grief, hypnosis, deception, and the search for truth. After a regression session awakens the mysterious voice of Abel March, Ruben becomes trapped between manipulation, disturbing memories, and a possible spiritual reality. To regain his freedom, he must learn to distinguish truth from illusion—and decide whose voice he will follow.
A thoughtful Christian dialogue exploring different views on Israel, the Church, and the future Messianic Kingdom. Through Scripture, church history, and contemporary perspectives, two friends discuss biblical promises, fulfillment in Christ, Romans 9–11, the land, the millennium, and the modern State of Israel. A balanced and accessible book for readers interested in theology, prophecy, and Jewish-Christian relations.
Complementary Healthcare in the Light of Scripture
Master Reference Edition
A Scientific, Psychological, Neuroscientific and Biblical Evaluation
In an age of rapidly expanding healthcare options, Complementary Healthcare in the Light of Scripture provides a comprehensive and balanced exploration of complementary therapies from both a scientific and a biblical perspective.
This Master Reference Edition brings together evidence from medicine, psychology, neuroscience, interpersonal neurobiology, trauma research, and Christian theology to help readers distinguish between therapies that are clinically valuable, those that remain scientifically unproven, and those that may raise ethical or spiritual concerns.
Rather than rejecting or endorsing complementary healthcare as a whole, the book encourages careful discernment. Each subject is examined through the lenses of current scientific research, clinical practice, and the teachings of Scripture, offering readers a framework for responsible and informed decision-making.
Topics include:
- Complementary and Integrative Healthcare
- Evidence-Based Medicine
- Psychology and Psychotherapy
- Neuroscience and Neuroplasticity
- Trauma and the LIFE Model
- Attachment Theory and Interpersonal Neurobiology
- Spiritual Formation and Christian Discipleship
- Communication and Emotional Health
- Discernment of Spiritual Influences
- Biblical Anthropology and Human Flourishing
Designed as both a reference work and an educational resource, this volume features a structured chapter format with learning objectives, key concepts, clinical applications, biblical reflections, chapter summaries, and carefully documented references.
Written for healthcare professionals, pastors, counsellors, educators, theology students, and thoughtful readers, this book seeks to build bridges between scientific knowledge and biblical wisdom while maintaining respect for both rigorous academic research and historic Christian faith.
Rather than presenting simplistic answers, Complementary Healthcare in the Light of Scripture equips readers with practical tools for evaluating healthcare practices critically, compassionately, and biblically.
This Master Reference Edition has been developed as a long-term scholarly resource, intended to serve as an authoritative reference for study, teaching, professional practice, and personal reflection.
About the Author
Gerard Feller has devoted many years to researching the relationship between complementary healthcare, psychology, neuroscience, and biblical theology. His work is characterized by a commitment to careful scientific evaluation, theological integrity, and practical application. Through extensive study and interdisciplinary research, he seeks to help readers navigate complex healthcare issues with both intellectual rigor and spiritual discernment, fostering an integrated understanding of health, healing, and Christian faith.