Reddit reviews Questioning Islam: Tough Questions & Honest Answers About the Muslim Religion

Questioning Islam by Richard Townsend is the closest to a critical account that does a fair job of staying impartial (that I've found anyway). The premise is not the history of Islam, but almost every observation is supported by references from the Quran and Hadith. It's not perfect, and I don't agree with everything he says, but it is a good read nonetheless.

I'm not sure I understand what you mean when you say "emotionally not critically".

I did some digging, which I should have spent more time doing before I asked for help, and found some things that I think look interesting (here they are in case you are curious):

http://www.amazon.com/Questioning-Islam-Questions-Answers-Religion/dp/1500336203/ref=sr_1_1?ie=UTF8&qid=1416328416&sr=8-1&keywords=questioning+islam

http://www.amazon.com/Why-I-Am-Not-Muslim/dp/1591020115/ref=sr_1_1?ie=UTF8&qid=1416328436&sr=8-1&keywords=why+I+am+not+a+muslim

http://www.amazon.com/Leaving-Islam-Apostates-Speak-Out/dp/1591020689/ref=pd_sim_b_16?ie=UTF8&refRID=18AP881NZ4JVSDVSR2V5

http://www.amazon.com/Leaving-Islam-Apostates-Speak-Out/dp/1591020689/ref=pd_sim_b_16?ie=UTF8&refRID=18AP881NZ4JVSDVSR2V5

The last one might be especially relevant to this sub (self explanatory).

Thanks for the response either way