The New Testament contains 21 letters, also known as epistles, which were written by early Christian leaders to various communities and individuals. These letters provide guidance, instruction, and encouragement to the early Christian church. Here is a list of the 21 letters:
1. Romans
2. 1 Corinthians
3. 2 Corinthians
4. Galatians
5. Ephesians
6. Philippians
7. Colossians
8. 1 Thessalonians
9. 2 Thessalonians
10. 1 Timothy
11. 2 Timothy
12. Titus
13. Philemon
14. Hebrews
15. James
16. 1 Peter
17. 2 Peter
18. 1 John
19. 2 John
20. 3 John
21. Jude
These letters are divided into two categories: Pauline Epistles and General Epistles. The Pauline Epistles are letters written by the Apostle Paul, while the General Epistles are written by other early Christian leaders. Each letter addresses specific issues and provides theological insights that are still relevant to Christians today.