An explanation of the 'real' message and relgion which Jesus (peace be upon him) came with, from both the Bible and the Qur'an.
Author: Abu Ameenah Bilal Philips
Source: http://www.islamhouse.com/p/1249
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
Saheeh International, based out of Saudi Arabia, Translated the meaning of the Quran in English, which is most appropriate for non-Muslims, it is easy and clarity of words and meanings.
Publisher: http://www.islambasics.com - Islam Basics Website - Sahih International
An Excellent Gift to Students of Islamic Sciences Literally translated 'The Fundamental Principles of Qur'aanic Interpretation,' this book refers to the branches of knowledge which are necessary to provide an accurate interpretation of the Qur'anic texts, such as Arabic grammar and syntax, Arabic literature and Qur'anic sciences ('uloom al-Qur'aan). Addressed topics include the Tafseer of the Qur'an, books of tafseer, translations of the Qur'an, Wahy ('divine revelation'), reasons for revelation, the differences between Makkan and Madinan revelations, Naskh, the Muhkam and Mutashaabih, and more.
Author: Abu Ameenah Bilal Philips
A monumental work discussing the Makkan period of the Prophet's life, and a refutation of Orientalist attacks.
Author: Muhammad Mohar Ali - Mohammed Mahr Ali
This is a useful book although it is small. It contains some technical terms for da'wah in English. No doubt all scholars and callers to Islam in English are in much need to something like that to conveys the right message of Islam to all those speak English.