The works of Harun Yahya deal with a wide range of subjects, especially political, faith and scientific matters. His books dealing with Islamic moral values have been prepared taking the verses of the Qur'an and the Sunnah of our Prophet (pbuh) as their basis. All of Harun Yahya's books invite people to learn the verses of Allah and to live by the moral values of the Qur'an. All subjects concerning Allah's verses are explained in such a way as to leave no doubts or question marks in the reader's mind. His political books offer the reader a new perspective. In these works, based on hundreds of original Turkish and foreign sources, political and sociological matters are analyzed. Scientific works, on the other hand, present proofs of the incomparable creation of Allah, the Lord of infinite might and power, in all parts of the universe. These works reveal various proofs of creation, both in the reader's own body and in the universe as a whole, and afford people the opportunity to think deeply about these.
- Anyone reading the books of Harun Yahya learns how to live by religious moral values every moment of his or her life. Even though they may have read widely on the subject of religion, many people have little idea about how to make it part of their daily lives. Yet Harun Yahya's books explain in detail how a Muslim should live, his or her daily life, thoughts, religious observations, perspective on life and events, and how he or she should react in the face of events. Readers of these books rid themselves of all forms of erroneous thought, superstition and incorrect ideas regarding religion, and learn true religious moral values. They understand how to live in conformity with those values 24 hours a day.
- Those of Harun Yahya's books aimed at children explain Allah's infinite might and power, and set out the proofs of creation, in very clear, simple and easy to understand language. Children's education is of the greatest importance. Children raised on sound foundations from their earliest years, who know the truth and learn the original sources of everything, are a great deal more aware in later years. That education must allow children to avoid being taken in by perverted philosophies and harmful ideologies, and not to fall into such traps. Otherwise, it is easy for young people raised on weak foundations, unaware of the purpose of life and of spiritual values, and spiritually weak, to fall into such errors. For example, the book Let's Learn Our Islam teaches children about Islam in the most accurate, clearest, easiest and understandable way. As in all of Harun Yahya's works, there is no room in his books for children for any superstitious belief, wrong ideas, twisted beliefs or fanaticism.
- The sincere, unadorned and flowing style employed in the books make them accessible to everyone, from 7 to 70. Thanks to this clear and effective style, these books can literally be read "at a single sitting." Even those who are most insistent on their rejection of religion are influenced by the facts set out in these books and are unable to deny their truth.
- All of Harun Yahya's works can be read alone, or to stimulate group discussion. Readers wishing to make use of these books can usefully study them in a group and express their own ideas and experiences regarding the subject in question.
- Contributing to the presentation and reading of these books, which are written solely to obtain the approval of Allah, is a major service, since the author's demonstrative and convincing aspect is very powerful in all his books. Therefore, the most effective method for those wishing to tell others about the religion is to encourage others to read them.
- Unlike in some other books, there is no trace of the author's personal opinions, accounts based on doubtful sources, any style lacking in the formality and respect due to sacred matters, or explanations which might lead to hopelessness, doubt or despair.