McGrew suggested three books one can read to get further information. You can get two of them from Amazon.com and I added links to them below. The third book, Dr. McGrew mentioned can be found at this link: The Four Gospels from a Lawyer’s Standpoint (1893). You can get the link to the audio from Apologetics 315 given at the end of the post.
Another point of note is that McGrew has been criticized and attempted and failed rebuttal was made by Edward T. Babinski. Given that Babinki has contributed to John Loftus' blog Debunking Christianity often and is mentioned there highly, I find it
Undesigned Coincidences in the Gospels by Tim McGrew - Apologetics 315