On a more seminary level, the classic book by Edward Fudge, The Fire that Consumes, is also highly recommended (see reviews above). Visit www.edwardfudge.com for more articles on this topic.UPDATE: Edward has just released his latest book on the topic called Hell: A Final Word. It can be found on Amazon. Also, a full length motion picture movie was just made about his life. It is called Hell and Mr. Fudge.
William Robert West has put a great deal of research into, Resurrection and Immortality at www.robertwr.com. NOTE: Mr. West takes the amillennial position when dealing with Israel, so in that one area I would not agree with him.