Why I Chose Islam: A story of a priest who reverted to Islam, it is based on a True Story.
Author: M. Emery
Publisher: Islamic Propagation Office in Rabwah
A useful booklet shows 1000 acts of Sunnah of the Prophet Muhammad (peace be upon him). It contains different situations i.e. waking up, going to the bathroom, performing ablutions, using sewak, wearing shoes, wearing clothes, going out and coming back home, going to the mosque, athan, iqama, praying at night and post-prayer sunnahs.
Author: Khaled Al Husainan - Khaled Al-Husainan
Publisher: http://www.rasoulallah.net - Website of Rasoulullah (peace be upon him)
A detailed account of the life of the Prophet, may god praise him.
Source: http://www.islamhouse.com/p/1245
This book is published on the shoulders of those people who have volunteered their personal stories of how they entered Islam. If you, the reader, are open to the possibility that Allah, the Creator, has given you clear evidence to accept Him and His message of Islam, then read these stories. From different backgrounds, and different experiences, you just might find someone here who had the same questions and doubts that you may have. Many of these people have endured against tremendous obstacles, including parental opposition, despair with other religions, being blind, and being lied to about the true nature of Islam.
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
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