Steve Gregg covers all the major views on the timing of the rapture and clearly shows what the Bible says about it.
You may also want to see Steve's classes on the book of Revelation.
The audio series also may be downloaded here.
Right-click here and Save to download Steve's outline of his Eschatology lectures.
They are also embedded below. This lecture is outlined on the 13th page.
Right click here and Save to download a student's much more detailed notes of Steve's eschatology series. They are also embedded below. His notes on this lecture are on pages 36-44.