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
This is a small booklet which has Islamic teachings for the Muslim Ummah.
Author: Abdul Aziz bin Abdullah bin Baz
Reveiwers: Dr. Saleh As-Saleh - Muhammad AbdulRaoof
Publisher: Cooperative Office for Propagation, Guidance, and Warning of Expatriates in the city of Naseem - A website Islamic Library www.islamicbook.ws
Did God Become Man: The main purpose for writing this booklet is to reach those who believe in God and cause them to reflect on the nature of their beliefs in the light of reason and revelation. The booklet is actually the edited version of a lecture, which I have delivered on many occasions and in many locations around the world. The positive response of the varied audiences to this lecture encouraged me to prepare it as a booklet in order to make it accessible to a wider audience.
Author: Abu Ameenah Bilal Philips
The Three Fundamental Principles and the Four Basic Rules of Islam.
Author: Muhammad Bin Abdul Wahhab
Publisher: Daar Al-Watan
Source: http://www.islamhouse.com/p/1333
This is the second treatise in the collection The Beliefs of the Pious Predecessors and the People of Hadeeth. The Author present it to the respected readers after Allah has ennobled him by making him concerned with it and by checking and verifying the ahaadeeth mentioned therein, (all) by the bounty of Allah, the Exalted
Author: Imam Ahmed ibn Hanbal
This treatise was prepared by the Agency of Islamic Enlightenment in Hajj. Includes a discussion about those things which nullify a person's Islam as well as common errors made by the commonfolk.
Author: Muhammad ibn Saleh al-Othaimeen
Source: http://www.islamhouse.com/p/1377