This book, "নফসের জিহাদ" (The Jihad of the Nafs), is authored by Sheikh Ahmad Musa Jibril. Sheikh Ahmad Musa Jibril is a prominent Palestinian-American Islamic preacher, scholar, and imam. He is known for his deep knowledge in Quran, Hadith, Aqeedah, and Fiqh. In this book, he likely delves into the internal struggle against one's own lower self (nafs), a concept central to Islamic spirituality and self-purification. The book is available for purchase or download from various Islamic book websites such as Wafilife.com and Rokomari.com.