You can easily read through the New Testament every month. Think about it:
— four books are only one chapter (Philemon, 2 John, 3 John, Jude)
— thirteen books are six chapters or less
(6 chapters = Galatians, Ephesians, 1 Timothy)
(5 chapters = 1 Thessalonians, James, 1 Peter, 1 John)
(4 chapters = Philippians, Colossians, 2 Timothy)
(3 chapters = 2 Thessalonians, Titus, 2 Peter)

Only ten books are left. See my suggested plans below for these larger books.

Matthew
Mark
Luke
John
Acts
Romans
1 Corinthians
2 Corinthians
Hebrews
Revelation