Ibn Rajab al-Hanbali This is a treatise we have written concerning humility (Khushu') and the hearts meekness and breaking (inkisar) before the Lord. The basic meaning of Khushu', is the softness of the heart, its being gentle, still, submissive, broken, and yearning. When the heart is humble, so too is the hearing, seeing, heard, and face; indeed all the limbs and their actions are humbled, even speech. The source of the Khushu, that takes place in the heart is the gnosis of Allah's greatness, magnificence, and perfection.
Author: Ibn Rajab Al-Hanbali
This short booklet is a translation of a khutba (sermon) delivered by Shaykh Muhammad ibn Salih on the 12th of Muharram in the year 1411AH. Which has been published in Arabic under the title: Athar ul-Ma’aasee ‘ Alal Fardi Wal Mujtama.’
Author: Muhammad Salih Al-Munajjid
Forty Encounters With the Beloved Prophet -Blessings and Peace Be Upon Him- His Life, Manners and Characteristics: these encounters in a brief and simple way in order to present Muslims with a glimpse of Prophet Muhammad -pbuh-, his guidance and some of the aspects which made him a role model
Author: Adel ibn Ali Al-Shiddy
This is a small book in which it answers 32 questions through Qur'anic verses. It answers questions about Allah, the true creator, previous nations, meaning of worship, saving Quran from corruption, Prophet Muhammad and Prophet Jesus (peace be upon them), the Hereafter and destination of both believers and disbelievers.
Author: Mohammed Bin Yahya Al-Taum - Muhammad ibn Yahya Al-Toom
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
This book is one of the most important Islamic books which gives right answers about Christianity.
Author: Sheikh-ul-Islam ibn Taymiyyah