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
The "Islamic Studies" series of books by the prolific writer and scholar Dr. Bilal Philips are part of a meticulously written series intended to guide young Muslims in a manner that helps them acquire a thorough practical and spiritual foundation. This series have been generally acknowledged as an excellent introduction set to the principles of the Islamic faith, with core sciences discussed and explored, for both the new Muslim as well as the "old" Muslim wishing to brush up on the fundamentals.
Author: Abu Ameenah Bilal Philips
A nice book covering many aspects of wudoo, ghusl, tayammum, and wiping over socks and bandages.
Author: AbdulRahman Bin Abdulkarim Al-Sheha
Source: http://www.islamhouse.com/p/1381
Fiqh us-Sunnah
Author: Sayid Sabiq
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
A book which presents Islam to educated readers in the West in particular and from any other background in general. It is a book the covers a wide variety of topics from religion ot sceince and philosophy. It tackles the problem of atheism and darwinism but presents Islam from its authentic sources and shows the remarkable intellectual heritage presented by Islam as complete way of life. Finally, it is the right book to give to sincere truth seekers worldwide, God willling.
Author: Abdullah ibn Saeed Ash-Shehri
Publisher: http://www.jubaildawah.org - The Website of The Cooperative Office for Propagation, Guidance, and Warning of Expatriates - Jubail