Journey from Doubt to Faith is an intellectual book written by Mostafa Mahmoud inThe book covers a variety of intellectual topics related to the creation of man, body, and mind. It speaks in detail about the author's long journey from doubt to faith.

The book's main features include easy searching by word or page number, the ability to zoom in and out of the text as needed, an index containing all the book's topics, tabbed page markers, lightning-fast navigation between pages and topics, no unethical or religiously inappropriate ads, and the ability to resume reading from the same page later.