Imaam Muhammad ibn Abdil Wahhaab gives arguments in Kashfush Shubuhaat (Removal of the Doubts) through which he says:
the average person from the muwahhideen (people of tawheed) will overcome a thousand of the scholars of the mushriks (people of shirk)…
However, this is not a starter book. You will need to have studied The Four Principles (Qawaaidul Arba-ah) beforehand.
KASHFUSH SHUBUHAAT Q&A goes through the book using the explanations of Shaykh Muhammad ibn Saalih al Uthaymeen and Shaykh Saalih al Fawzaan. The Questions and Answers (Q&A) take you through these two explanations and can be used as an independent resource.
To follow even more clearly where you have reached, you may wish to download the Kashfush Shubuhaat MATN with SUMMARY by Shyakh Aale Shaykh.
Both the Q&A and the text in English have been translated by Nasser ibn Najam and checked by Abu Talhah Dawood Burbank who was enthusiastic that someone prepare such resources in English.