I can provide some perspectives on this hypothetical situation.
If there were a book with the knowledge capable of curing any emotional or traumatic suffering, the ethical choice would likely be to make it widely accessible and give it away for free. Trauma and emotional suffering are widespread issues that affect countless individuals across the world, often leading to significant distress and impairment in people's lives.
By making such knowledge freely available, more people would have the opportunity to heal and recover from their emotional wounds, leading to a more compassionate and empathetic society. If the knowledge truly had the power to alleviate immense suffering, withholding it for monetary gain could be seen as unethical and exploitative.
Promoting the well-being and mental health of individuals should be a priority, and resources that can genuinely make a positive impact on people's lives should be made accessible to as many people as possible. In real-life situations, various organizations and professionals work to provide mental health support, therapy, and resources at low or no cost to those in need.
It's important to remember that in reality, the cure for all emotional and traumatic suffering may not be as simple as a single book. Healing is a complex process that can require a combination of approaches, professional help, support systems, and individual resilience. Nevertheless, making valuable knowledge and resources available to those who need them can play a vital role in supporting people's well-being and mental health.