Reddit reviews The Earliest Christian Artifacts: Manuscripts and Christian Origins

The Earliest Christian Artifacts: Manuscripts and Christian Origins and Lord Jesus Christ: Devotion to Jesus in Earliest Christianity, both by Larry Hurtado.

Neither is aimed at trying to "prove" the claims of Christianity to doubters, but both books are about reading early manuscripts and documents in their original context.

Hurtado doesn't refer to any vague "consensus of scholarship" - he names names and responds specifically to the published theories of recognized scholars, either agreeing or disputing their readings, but always on the basis of what the original texts have to say for themselves.

"The Earliest Christian Artefacts" by Larry Hurtado is about the physical and other characteristics of the oldest manuscripts: https://www.amazon.com/Earliest-Christian-Artifacts-Manuscripts-Origins/dp/0802828957

The Credo Course training on Textual Criticism, by Dan Wallace, is probably exactly what you're looking for. It was a free download some weeks ago, but now goes for USD 99. https://www.credocourses.com/product/textual-criticism-audio/

As a 'current affairs' read on this stuff, I recommend the Evangelical Textual Criticism blog. Content wise it has been a bit dry for the last weeks but I'm sure there'll be interesting reads in the future: http://evangelicaltextualcriticism.blogspot.com/

If you want to stay on the cutting edge, Brent Nongbri is a name to keep in mind. Brent is a Christian I believe, but he's a bit sceptical about some very early dates for manuscripts, claiming they could also have been a bit later: https://brentnongbri.com

Edit: I saw this on Kindle, for a few US Dollars, by B.B. Warfield. Obviously not current in any way, but might still be a useful introduction: https://read.amazon.com/kp/embed?asin=B004XMP0TW&preview=newtab&linkCode=kpe&ref_=cm_sw_r_kb_dp_tURyCbBRPWW8S