Ibn Taymiyyah said: "This (enjoining good and forbidding evil) is a duty that the entire Ummah is obliged to fulfil. It is what the Ulama know as an obligation of collective responsibility, if a group in society undertook to discharge it, the other members of this society are absolved from it. The entire Ummah is commissioned to undertake it, but if a group therein was responsible for discharging it, the rest of society is no longer obliged to undertake it."
Author: Sheikh-ul-Islam ibn Taymiyyah
Reveiwers: Muhammad AbdulRaoof
Translators: Salim Abdullah Marjan
A very famous book on King Abdul Aziz noble character.
Author: Khalid Aljuraisy
Reveiwers: Muhammad AbdulRaoof
Publisher: http://www.alukah.net - Al Alukah Website
Time management from Islamic and Administrative perspective
Author: Khalid Aljuraisy
Translators: Muhammad Atif Mujahid Muhammad
Publisher: Al-Juraisi Foundation - http://www.alukah.net - Al Alukah Website
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
This book clearly and concisely presents the Islamic concept of Tawbah (repentance) and its viewpoint wherein salvation by faith and salvation by deeds are combined in a truly unique manner. A book that is relevant to every Muslim.
Author: Abu Ameenah Bilal Philips