Detailed books/talks on comparative religion

[Absar.Ahmed]

Assalaamu-alaikum,

I am looking for books or even talks (detailed if possible rather than briefly browsing over the subject) which refute comparative ideologies i.e. Christianity etc. I want to give some books/talks to some work colleagues who I have engaged in interesting dialogues with, as well as some friends who I am giving dawah to. Unfortunately, people like Ahmad Deedat and Zakir Naik have done alot of talks etc refuting Chrisitanity as well as other faiths, but there is no way I'm be recommending these individuals.
A couple of revert brothers at work who I have been engaging with for years, Alhumdu-lillah are beginning to accept the Salafi dawah, and even they have enquired whether any Salafi Shuyookh or individuals have done any detailed books/talks on refuting other faiths etc. Any help here would be much apprecaited, Jazakallah khair.

Wassalaamu-alaikum Wa Rahmatullahi Wa Barakatuhu