Final answer:
The last New Testament book likely written was the Book of Revelation, around 95-96 AD, recognized for its apocalyptic themes and symbolic language, which mark its distinctiveness among New Testament writings.
Step-by-step explanation:
The question of which New Testament book was written last is a topic of historical debate, but many scholars agree that the Book of Revelation, also known as the Apocalypse of John, is likely the final New Testament book to have been written. Although the exact date of composition is uncertain, it's generally believed to have been written toward the end of the 1st century, around 95-96 AD, during the reign of Emperor Domitian. This timeline is supported by the state of Christianity at the time, where textual and doctrinal consistency was still evolving and far from being universally defined.
The Book of Revelation stands out due to its apocalyptic literature and prophetic themes, which differentiate it from the other biblical texts such as the Gospels and the Epistles. This book contains visions of the end times, descriptions of the struggles between good and evil, and the ultimate triumph of God. It is unique in its use of symbolic language, imagery, and complex allusions that continue to be interpreted and debated among scholars and theologians.