Hajj and Tawheed: Hajj is to set out for Makkah to worship Allah by performing certain religious rights in accordance with the Prophet's (peace and blessings be upon him) Sunnah. It is a time in which to call upon Allah to purify the self from any worship to anyone other than him. This booklet explains the basic rights of Hajj. It also notes that the tawheed of Allah requires the Muslim to follow the perfect way of worship, demonstrated by Muhammad (peace and blessings be upon him) and as understood by the Sahaabah who were the best of mankind.
Author: Dr. Saleh As-Saleh
A discussion of the 'pillars' of Eemaan and the factors which invalidate ISlam and remove a person from its fold.
Author: Abdul Aziz bin Abdullah bin Baz
Source: http://www.islamhouse.com/p/1227
The Tenets of Faith, Creed of Ahlu Alsunnah and Aljamah: This Book Present the Pillars of Eman in a very Simple way.
Author: Muhammad ibn Saleh al-Othaimeen
Translators: Mane' Bin Hammad Al-Juhani
Publisher: http://www.al-hidaayah.co.uk - Al-Hidaayah Publishing and Distribution Website - Books of the office of propagation in Ulayya, Sulaymaniyah and north of Riyadh
An excellent 18 page treatise upon the excellence of Hajj and its rulings. Taken from Silsilah Ahadeeth As-Saheehah & Silsilah Ahadeeth Ad-Daeefah. Translated by Abbas Abu Yahya
Author: Muhammad Naasiruddeen al-Albaanee
Translators: Abbas Abu Yahya
A very useful article shows the pure Islamic belief of monotheism. It briefly mentions that Allah alone is worthy of worship, He is worshipped directly and Allah is not like his creation nor his creation is like him.
Author: Abdur-Rahman Demashqeyyah
Reveiwers: Muhammad AbdulRaoof
Publisher: An Islamic centre of Qatar www.fanar.gov.qa
A nice book covering many aspects of wudoo, ghusl, tayammum, and wiping over socks and bandages.
Author: AbdulRahman Bin Abdulkarim Al-Sheha
Source: http://www.islamhouse.com/p/1381