Authors will always have, in their a books, a certain degree of biaseness. So what a book tells you may not always be 100% accurate. There will always be that element of the authors opinion.
So, regarding yur research and questioning...the information you gather also depends on the stand point of the author.
Just a thought to keep in mind whilst researching.
Regarding the topic of denominational politics...I reckon its this denominational ideaology that is the enemy of the Body of Christ. This denominational spirit keeps the body seperated...keeps us fighting little wars whilst the enemy has a field day. I live for the day hen all denominational walls come down and there is only one church in Christ. Denominations are man made...it works against the Body of Christ.