The New Testament is easily divided up.
Matthew, Mark, Luke and John tell the story of Jesus.
Acts tells the story of what happened in the thirty or so years after Jesus'
death on the cross and resurrection.
Following that is a series of letters (or epistles). Romans right through to
Philemon were written by Paul. We don't know who wrote Hebrews. And then James
(the brother of Jesus) wrote James, Peter (the disciple) wrote 1 and 2 Peter,
John (the disciple) wrote 1, 2 and 3 John and Jude (younger brother of Jesus
and James) wrote Jude. The letters are written to churches and to individuals.
All serve to explain the significance of Jesus and how to live as one who loves
God in light of Jesus, awaiting his return.
Revelation is written by John - a record of the visions God gave him to
assure all Christians that Jesus will come again and at that time, all will be
made perfect under God for those who love Him.