Exodus

The book of Exodus was written by Moses.  Some scholars add a caveat that Moses must have had several people helping compile and gather all the material.  The Exodus happened about 1445_BC. but there is support for a later date of early thirteenth century.  This means the Exodus began in 1875_BC if the time in the land was 430 years as most believe (Ex 12:40-41; Genesis 15:13 & Acts 7:6 say 400 years).  There is a 215-year theory that comes from Ex12:40 Septuagint that theorizes it was 430 years of sojourn in Canaan and Egypt.  It's 215 year from the time Abraham receives the promise to when Jacob entered the land and then 215 years in Egypt till the law was delivered to Moses. 

Needless to say, the dates are hard to nail down.  No one set of facts goes unchallenged by another set.  The bible has never been proven wrong, so figuring out why the facts don't seem to match is the exercise.  What we can know is that Moses had been 40 years old after being raised and educated in the Pharaoh's courts when he left Egypt.  He was 40 years in the Midian desert being prepared by God.  He began the Exodus at 80 and spent another 40 years taking the Israelites to the Promised Land.

Outline of the book of Exodus

• Slavery of God's people
• Birth of Moses – calling of deliverer
• Headed home
• The desert journey
• Giving of the law
• The Tabernacle & Priests
• Rebellion & Judgment
• A Return to Exodus