The following books are recommended for further reading in the chapter “The Gospels Contradict Each Other”, in That’s Just Your Interpretation: Responding to Skeptics Who Challenge Your Faith, by Paul Copan.
The Historical Reliability of the Gospels (Craig Blomberg)
Can I Trust The Bible? (Darrell Bock)
Dictionary of Jesus and the Gospels (Joel Green, Scot McKnight, and I Howard Marshall)
Studying the Synoptic Gospels: Origins and Interpretation (Robert Stein)
The Synoptic Problem (Robert Stein)
Jesus The Miracle Worker (Graham Twelftree)