Discover Islam: A brief book that guides a person towards Islam, Islam is the religion and way of life of about one Fifth of the world's population. Muslims are of diverse nationalities, cultures and races, but their Religion teaches that all humanity is essentially equal. It guides them to the Straight Path.
Publisher: Ministry of Islamic Affairs, Endowments, Da‘wah and Guidance
This book gives a clear explanation of the Muslim sound Creed which is the core of the religion of Islam, as the belief in Tawhid (monotheism) is the purpose for which Allah created both mankind and jinn, and thus, those whoes belief in Tawhid is corrupt, are not considered Muslims.
Author: Saleh Bin Fawzaan al-Fawzaan
One of the most detailed books describing the rulings of Hajj, Umrah, and visiting the Masjid of the Prophet (peace be upon him).
Author: Sayid Sabiq
Source: http://www.islamhouse.com/p/1395
The Muslim Creed - 'Commentary on the Creed of Aqeedah At-Tahaawiyyah.
Author: Abu Jafar at-Tahawi
This is a small book in which it answers 32 questions through Qur'anic verses. It answers questions about Allah, the true creator, previous nations, meaning of worship, saving Quran from corruption, Prophet Muhammad and Prophet Jesus (peace be upon them), the Hereafter and destination of both believers and disbelievers.
Author: Mohammed Bin Yahya Al-Taum - Muhammad ibn Yahya Al-Toom
A description of Death, the Life of the Grave, and the Day of Judgment.
Publisher: Islamic Propagation Office in Rabwah
Source: http://www.islamhouse.com/p/1229