What are the books, other than the Qur’an, that you recommend reading to increase knowledge of Allah and refute misconceptions and whispers?

Areas of doubt are many, and their causes stem from ignorance of the objectives of the religion. Their remedy lies in increasing and deepening one's knowledge of Islamic sciences. As for whispers (waswas), their remedy is to disregard them, distract oneself, and occupy oneself, while seeking refuge in Allah, relying on Him, and entrusting all matters to Him.