A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243
Sahih Muslim includes sayings, doings and approvals of the Prophet Muhammad (peace be upon him) narrated by his companions. It is considered the third most authentic book in Islam after the Quran and "Sahih al-Bukhari". It covers almost all aspects of life.
Author: Muslim ibn al-Hajjaj ibn Muslim al-Qushairi an-Naisabori
Translators: AbdulHamid Siddiqui
Publisher: http://www.islamspirit.com - Islam Spirit Website
A proof that the Qur'an is from God and that Muhammad is a Messenger of God.
Author: The Memphis Dawah Team
Publisher: Memphis Dawah
Source: http://www.islamhouse.com/p/1283
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
A very famous book on King Abdul Aziz noble character.
Author: Khalid Aljuraisy
Reveiwers: Muhammad AbdulRaoof
Publisher: http://www.alukah.net - Al Alukah Website
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: Faisal Bin Ali Al-Ba'adani
Reveiwers: Muhammad AbdulRaoof
Publisher: A website Islamic Library www.islamicbook.ws