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
The source of all evil is the deviation from the truth and its straight path. The goodness of all matters is the following of truth and adherence to its right way. Truth is the fixed state in which Allah has created every creature in a particular way and managed its affair in a certain manner. Allah is Perfect and exempt from any deficiency or error. This book aims to elucidate the pillars of Imaan (basis of belief, faith) and the characteristics of Kufr (disbelief) and its causes.
Author: Sheikh-ul-Islam ibn Taymiyyah
This book is one of the most important Islamic books which gives right answers about Christianity.
Author: Sheikh-ul-Islam ibn Taymiyyah
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
Iqtidaa-ul-‘Ilm al-‘Amal By Al-Khateeb Al-Baghdaadee. This is the second book in the "Classical Knowledge Series", which is a collection of selected scholarly works from the past that deal with the subject of religious knowledge. The first book in this blessed series was “The Book of Knowledge” written by Imaam Abu Khaithamah Zuhayr bin Harb An-Nasaa’ee (Died 234H), may Allah have mercy on him. Since that book served as an introduction to knowledge, its virtues, merits and manners, it seemed proper that the second book be dedicated to the next level of knowledge, which is its result and outcome, and that is righteous deeds. And what better work to present on this subject than the classic and well-known treatise of the distinguished Imaam, Al-Khateeb Al-Baghdaadee, 'Iqtidaa-ul-‘Ilm al-‘Amal' (Knowledge Mandates Action).
Author: Al-Khateeb Al-Bagdadi - Al-Khateeb Al-Baghdadi
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