The Fiqh of Worship. The book of al-‘Umdah is an abbreviated book of Fiqh according to the hanbali school of Fiqh (madhhab).
Author: Hatem Al-Haj Ali
Reveiwers: Muhammad AbdulRaoof
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 small treatise concern knowledge & scholars, its importance & merits.
Author: Abdul Aziz bin Abdullah bin Baz
Publisher: http://www.al-hidaayah.co.uk - Al-Hidaayah Publishing and Distribution Website
Source: http://www.islamhouse.com/p/1257
Brief lessons in fiqh, da'wah (calling to Islam), Creed and hadeeth and its terminologies taught in the Educational Department of Islamhouse. They help Muslims to be aware of what he indeed needs regarding the Islamic sciences. They also give him a glimpse of qualities of the caller to Islam.
Publisher: Islamic Propagation Office in Rabwah
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