The Fatawa's of Shaikh-ul-Islam Ibn Taymiyyah (Rahimahullah). Though he preferred the Hanbali school of jurisprudence, he was never biased in favor of it, he frequently quotes the opinions of all four of the well-known schools of jurisprudence, even others. In a number of matters, he himself held opinions different from those of the four schools.
Author: Sheikh-ul-Islam ibn Taymiyyah
A brief but nice booklet discussing Zakaah, those items and amounts upon which it is due, and where it is to be spent. Includes a few important fataawa related to Zakaah
Author: Abdul Aziz bin Abdullah bin Baz
Source: http://www.islamhouse.com/p/1269
The story of one of the Companions search for the truth.
Author: Dr. Saleh As-Saleh
Source: http://www.islamhouse.com/p/1225
As the name implies, this book discussing the Wudhu (ablution, performed before prayer) of the Messenger of Allah (saw).
Reveiwers: Muhammad AbdulRaoof
The Hadith is Proof Itself in Belief & Laws
Author: Muhammad Naasiruddeen al-Albaanee
One of the most detailed books describing the rulings of Hajj, Umrah, and visiting the Masjid of the Prophet (peace be upon him).
Author: Sayid Sabiq
Source: http://www.islamhouse.com/p/1395