Undoubtedly, the heart leans towards those who are kind and gentle. It was said a long time ago: "Make your face happy and your words gentle, and you will be more beloved to the people than those who give them a gift". The one calling to the religion of Islam and dealing with other people has the utmost need to gather the people around him, and cause their hearts to lean towards him so that they will listen to him. Adorning himself with kindness and gentleness helps to achieve that goal with the grace of Allah.
The Hadith is Proof Itself in Belief & Laws
Author: Muhammad Naasiruddeen al-Albaanee
Islam, is a comprehensive way of Life, does not confine itself to the spiritual aspect of man's life only, rather its primary concern is with the application of its rules to the daily life of man, the author wrote it in an easy and simple method to achieve the very purpose of the book, namely introducing Islam to Muslims and non-Muslims, through the best and simplest way.
Author: Hammodah Abd al-Aati
Publisher: http://www.islamweb.net - Islam Web Website
The Nature Of Fasting: This book will help the reader better understand the fine points about fasting. like; What is the nature of the things that break the fast? What are the rules by which one can know the difference between what breaks the fast and what does not?
Author: Sheikh-ul-Islam ibn Taymiyyah
Publisher: http://www.dar-alsalam.com - Darussalam Publications Website
Take your Belief from the Quran and Sunnah: a booklet containing important questions of religious beliefs, the writer replied it was seeded with evidence from the Quran and Sunnah; to reassure the reader to answer correctly; because the doctrine of unification (Tawheed) is the basis of His Excellency rights in this world and the Hereafter.
Author: Muhammad Jameel Zeeno
Publisher: http://www.saaid.net - Saaid Al Fawaed Website
A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243