ًWhat is Islam?: This book explains basic introduction to the fundamental beliefs and practices of the Islamic faith. An attempt has been made to be as concise as possible, but with the hope that the reader will be encouraged to study Islam in more depth.
Author: Jamaal Zarabozo
Publisher: Ministry of Islamic Affairs, Endowments, Da‘wah and Guidance
This book is one of the most important Islamic books which gives right answers about Christianity.
Author: Sheikh-ul-Islam ibn Taymiyyah
An excellent 18 page treatise upon the excellence of Hajj and its rulings. Taken from Silsilah Ahadeeth As-Saheehah & Silsilah Ahadeeth Ad-Daeefah. Translated by Abbas Abu Yahya
Author: Muhammad Naasiruddeen al-Albaanee
Translators: Abbas Abu Yahya
Thus this book would, Allah Willing, gather whatever is relevant to each topic from the various contents of the books of Hadith and the books on the differences between the Madhhabs, such that the correct verdicts found in this book would not be found totally in any one Madhhab. Hence the one acting on it, Allah Willing, would be among those whom Allah had guided "by His Grace to the Truth concerning that in which they differed, for Allah guides whom He will to a path that is straight."
Author: Muhammad Naasiruddeen al-Albaanee
Reveiwers: Muhammad AbdulRaoof
Publisher: http://www.islamweb.net - Islam Web Website
The Muslim Creed - 'Aqeedatut-Tahaawiyyah.
Author: Abu Jafar at-Tahawi
Translators: Suhaib Hasan AbdulGhaffar
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