How can a young man of 18 who sometimes falls into sins be advised, and what are the names of recommended books on asceticism (zuhd) and sincerity (ikhlas) from which he can benefit?

It is recommended to fear Allah and avoid disobedience, especially in youth, because a person will be questioned about their life and youth. Among the most important means of piety is to choose good company that helps in obedience and to avoid bad company. It is also recommended to recite the Holy Qur'an frequently due to its effect on strengthening the heart, and to strive in seeking Islamic knowledge from its qualified scholars, as it illuminates insight and instills the fear of Allah. Among the recommended books are: "Mukhtasar Minhaj al-Qasidin," "Al-Ikhlas" by Yusuf al-Qaradawi, "Al-Mustakhlas fi Tazkiyat al-Anfus" by Said Hawwa, and Sheikh Omar Al-Ashqar's books on the Afterlife, in addition to reading the biographies of ascetics and companions such as "Siyar A'lam al-Nubala'" by Al-Dhahabi.