1 Maccabees is one of the deuterocanonical books of the Bible. 2 Macc is not a sequel to 1 Macc. In fact, 2 Macc tells many of the same stories from a slightly different perspective than 1 Macc.
The Codex Alexandrinus contains all of the Catholic OT Books plus III and IV Maccabees. These manuscripts show that the Septuagint with its larger and looser canon was the OT "Bible" of the early ...