The Bible is the inspired word of God, and its completion and contents were guided by the power of the Holy Spirit. This, as they say, was a process, not an event. There were multiple meetings of church leaders with many arguments, disagreements and controversies before the final contents of the Bible could be decided upon. This process would take centuries before the canon would be fully accepted by all elements of the Christian church.
Questions and curiosities about the Bible are not limited to the non-believer. Saint Paul in 1 Thessalonians tells us we should not take things at face value. "...examine everything; hold firmly to that which is good." (1 Thessalonians 5:21) - Don't be afraid to ask questions, and don't be afraid to accept the truth.
When and how were the books that make up the modern Bible decided upon? Why are there multiple translations of the Bible? Why do some Bibles have 66 books while others have 73 and still others 80 books? Who were the people involved? Which were the most important ancient manuscripts? Do the Dead Sea Scrolls contradict or confirm the Bible? How do the ancient manuscripts found in the Nag Hammadi Library fit into Bible History? Why were the Apocrypha Books excluded from the Bible, should they be included? Persecuted and outlawed, the early Christians fought to follow their faith and put together a canon of selected scripture which has lasted nearly twenty centuries.
Answers can be difficult, but there are many sources of information available from ancient times and some of the most reliable historians of antiquity. A vast number of ancient manuscripts exist to help confirm what we have today is the Bible the early church leaders intended. The Bible is the greatest story ever told, but there was some assembly required.