These are the resources I have found useful and have used for the Bible Study and the posts I have written: 

biblegateway.com

Archaeological Study Bible (NIV)

New Living Testament Bible

Apologetics Study Bible (Holman)

Key Word Study Bible (New American Standard)

“The Case for the Real Jesus” by Lee Strobel

“Evidence that Demands a Verdict” by Josh McDowell

Rose Book of Bible and Christian History Timelines

Holman New Testament Commentary: John