Quran text, translation and explanation by world renowned Islamic Scholar Syed Moudoodi.(Quran is word of God given to Prophet Muhammad through angel Gabriel.

http://www.englishtafsir.com

Sayings and doings of Prophet Muhammad are compiled and are called Hadith.

The book compiled of sayings of Prophet Muhammad is called collections of Hadith and here is the link. Hadith Sahih Bukhari

Towards understanding Islam by Mowdoodi

https://zulkiflihasan.files.wordpress.com/2008/06/towardsunderstanding.pdf

An illustrated guide to understanding Islam.

https://www.islam-guide.com/book-download.htm

The cross and the Crescent by Jerald Dirks.This covers interfaith dialogue.

https://islamicbulletin.org/en/ebooks/the_cross_and_the_crescent.pdf

Izhar ul Haq PDF format written by Moulana Kairanvi.This book is the oldest and the first one written on interfaith dialogue in India.

http://www.usislam.org/pdf/Izharul-Haq.pdf