The book titled "UNANSWERED PRAYERS AND FAILURES IN DELIVERANCE: MORE AN ISSUE OF THE LAW THAN OF POWER "is the first publication that addresses the problem of non- fulfillment of God's promises under the prism of spiritual law. The first part of this book tells about facts experienced by the author and having led her to ask the question of whether God is no longer the Almighty. It all started thirty years ago with an event which have deeply marked her life: an exorcist priest who had come to run his ministrations in her village located in Central Cameroon, collapsed under a bad spell from a recognized wizard, in the knowledge of everyone. Ten years after asking regularly this same question, the answer she receives from God leads her to be born again. After her conversion, she notices that many of God's promises to his children are not fulfilled and begin once more to question God tirelessly about this. It is then that she is suddenly elevated pastor in the ministry she attended. Not feeling prepared or qualified, this call to the service of God rather annoys her. A few weeks later, while in all honesty and respect for the sacred things, she had decided to meet with the Senior leader of the church to decline this call, the Lord spoke to her clearly, saying that He Himself called her to give her authority over demons. After much insistence from the Lord, she resolved to obey him and began to practice in intercession & deliverance. Great was her surprise to realize that the results were positive. It was then that, as a response to all the other questions she had long asked, the Lord revealed to her that "the main cause of deliverance's failures is that the Church is focused on Power and leave aside the Law." The second part of the book return on the existence of the invisible or spiritual world, and on its potential influence on the life of every man. The author points out the similarities existing between the Law and the relations governing the invisible and men. She defines the various actions of this spiritual world that are curses, enchantments, condemnations and their consequences such as oppression, captivity, etc. The chapter 11 lists the causes of unanswered prayers, those related to the covenant between God and the Christians, and those related to a third party opposition from the enemy; for example, it highlights the fact that, most of the time, the problem of unanswered prayers is due to the ignorance of the church about the enforcement procedures of God's decisions. The chapter 12 describes what is an effective prayer of deliverance, the one that combines the use of the Power and the mastering of the Sovereign law. The chapter 13 talks about the various controversies related to deliverance and insists on the fact that, without a real desire to repent and to walk according to the Truth, a Christian cannot be freed sustainably. The third part of the book analyzes in the light of the Holy Scriptures all the solutions of deliverance currently proposed in the Church, namely the resort to occultism or exorcism, the resort to customs and traditions, the resort to the prophets, the resort to "blessed " objects or products, the resort to self-deliverance. The author shows that these solutions are in the best case of Power, in the worst case of falsification, and are therefore incapable of solving law -related problems. The fourth part of the book is a hymn to the Omnipotence of God. After 12 years of experience as an instrument of deliverance and thousands of testimonies, the author recounts some cases attesting to Jesus Christ 's ability to deliver from satanism, infirmities, diseases, infertility, school failure, business failures, spells and so on.