This would be a good start point for him to learn about basic & core islamic teachings. The PDF is available in English as well as urdu. https://www.dawateislami.net/bookslibrary/1304
The following links all have downloadable pdf's: https://musjidulhaq.com/2016/03/08/the-first-speech-of-hazrat-isa-peace-be-upon-him-a-quranic-story/ https://musjidulhaq.com/2015/06/10/the-heavenly-revealed-books/ https://musjidulhaq.com/2016/05/23/interesting-fact-about-the-holy-quran/ On page 19 in the downloadable pdf available at this link: https://musjidulhaq.com/2016/05/18/the-significance-of-saturday-in-islam/ the following chapter with the heading: "5. Bani Israel conspired against Hazrat ‘Isa – peace be upon him – and were cursed and disgraced:" deals with the Islamic perspective regarding the events surround Nabi ‘Isa's – peace be upon him – ascension to the heavens. Hope above pdf's are helpful.
Salaam. The main focus must be to centre everything regarding this person on friendship and his interest will be maintained and heightened even, And the Prophet (Peace and Blessings of Allaah be upon Him) said: “A man will follow the religion of his close friend, so let each of you look to who he takes a close friend.” In other words keep him with you, invite him to things and keep him close so his friendship leads to his salvation.
I would recommend The Foundations of the Religion - see post here. Also why not a commentary on the Sanusi Creed - see Shaykh Abu Adam's here.
As Salamu Alaykum A friend's friend who is a christian has shown interest in learning about Islam. We are looking for PDF books on basics of ISLAM & how our religion differs from christianity & other religions. We shall further share these books with the christian guy. Can someone help? ~ Samir Shaikh [please PM to get his email address]