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
Source: http://www.islamhouse.com/p/78592
Download:
A book which explains the Prohibitions That Are Taken Too Lightly, Allah has laid down obligations which we are not permitted to ignore, and has set limits which we are not permitted to transgress, and has set out prohibitions which we are not allowed to violate.
Author: Muhammad Salih Al-Munajjid
Publisher: http://www.islamqa.com - Islam : Question & Answer Website
Source: http://www.islamhouse.com/p/185173
Download:
Fiqh us-Sunnah
Author: Sayid Sabiq
Source: http://www.islamhouse.com/p/51828
Download:
An excellent book for non-Muslims explaining various aspects of Islam.
Author: Pete Seda
Publisher: Islamic Propagation Office in Rabwah
Source: http://www.islamhouse.com/p/1301
Download:
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
Download:
A description of the Prophet's prayer from beginning to end.
Author: Muhammad Naasiruddeen al-Albaanee
Source: http://www.islamhouse.com/p/1273
Download: