A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243
What Does it Mean : You Are a Muslim ?
Author: Suleiman Saoud Al Saqer
Publisher: Islamic Propagation Office in Rabwah
These are three good books for learning Arabic Language for the non-native speakers. But we should pay your attention that they are for who has slightly good knowledge about Arabic and how to pronounce it. We don't claim that you can consider them as an alternative to a teacher but they are good step for who wants to be excellent at Arabic. With these books, there is an Arabic-English glossary confined to the words mentioned in these books, and the author shows in its introduction how to find any word.
A book shows the importance of these ten days and the excellence of deeds in them.
Author: Muhammad Salih Al-Munajjid
Publisher: Islamic Propagation Office in Rabwah
Source: http://www.islamhouse.com/p/1355
THE MUSLIM CREED is one of the best books on the subject of Tawheed (Islamic Monotheism) and ranks high in authenticity. Till date it has gone through various publications; and had been the means for guidance of the millions of people throughout the world; by taking them out of the darkness of polytheism and error.
Author: Suhaib Hasan AbdulGhaffar
Reveiwers: Muhammad AbdulRaoof
Publisher: http://www.dar-alsalam.com - Darussalam Publications Website
Brief guide concerning the fundamentals of Islam.
Author: Naasir Bin Abdulkarim al-Aql
Source: http://www.islamhouse.com/p/1295