This book gives a clear explanation of the Muslim sound Creed which is the core of the religion of Islam, as the belief in Tawhid (monotheism) is the purpose for which Allah created both mankind and jinn, and thus, those whoes belief in Tawhid is corrupt, are not considered Muslims.
Author: Saleh Bin Fawzaan al-Fawzaan
This book addresses an important subject, The only way to achieve true happiness is Islam and call for the faith in Allah and His angels, His Books, His Messengers, the Last Day, and destiny.
Author: AbdulRahman Bin Abdulkarim Al-Sheha
Publisher: http://www.islamland.com - Islam Land Website
Warning to those who have abandoned prayers
Author: Khaalid Abu Saalih - Khalid Abu Salih
Publisher: Daar Al-Watan
Source: http://www.islamhouse.com/p/1327
The Muslim Creed - 'Aqeedatut-Tahaawiyyah.
Author: Abu Jafar at-Tahawi
Translators: Suhaib Hasan AbdulGhaffar
A great book which explains the real beauty of Islam, by Dr Naji Ibrahim Arfaj.
Author: Naji Ibrahim al-Arfaj
Publisher: http://www.abctruth.net - ABC Truth Website
One of the works on this subject is his “al‐Fatwaa al‐Hamawiyyah” which he wrote as an answer to a question presented to him. In it, he was asked what the scholars and Imaams of the religion say concerning the Aayaat and the Ahaadeeth of the Si/aat, or the attributes and characteristics of Allah.
Author: Sheikh-ul-Islam ibn Taymiyyah