A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243
Concise examination of the Christian texts as well as the Islamic perspective of the purpose and message of Jesus
Author: Rashaad Abdul-Muhaiman
Publisher: El-Haqq Islamic Resource Center
Source: http://www.islamhouse.com/p/1367
Ibn Rajab al-Hanbali This is a treatise we have written concerning humility (Khushu') and the hearts meekness and breaking (inkisar) before the Lord. The basic meaning of Khushu', is the softness of the heart, its being gentle, still, submissive, broken, and yearning. When the heart is humble, so too is the hearing, seeing, heard, and face; indeed all the limbs and their actions are humbled, even speech. The source of the Khushu, that takes place in the heart is the gnosis of Allah's greatness, magnificence, and perfection.
Author: Ibn Rajab Al-Hanbali
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
Warning to those who have abandoned prayers
Author: Khaalid Abu Saalih - Khalid Abu Salih
Publisher: Daar Al-Watan
Source: http://www.islamhouse.com/p/1327
Issues that the caller to Allah must obtain
Author: Muhammad ibn Saleh al-Othaimeen