I have read so many books about personal visits to heaven/hell from a variety of authors. The first one that I read was "A divine revelation of hell" by Mary K. Baxter. I read this book when I was in high school back in the 1996... when I first read it, it scared the crap out of me! I was running around thinking I was going to hell and I was even scared to go to bed at night. Since then, Mary K. Baxter has came out with many other books about divine revelations that God allegedly has given her about heaven, the spirit world, and angels. In one of her books, she has even proclaimed that God personally told her that she was chosen to receive these revelations, and she claimed to have a "burning bush" experience.. something similar to what Moses experienced in the bible. Some of the things that are in her books are so far out and seem so unlike Jesus that it is very difficult to believe.
Since then other authors has came out with similar after life experiences and they quote scriptures to back up their stories about their out of body experiences.
Again, I believe that God can reveal what ever he wants to who ever he chooses and I don't want to call them liars because I have no clue as to whether they are really being honest or not. But I also believe that people come up with things to make money off of, including Jesus and the word of God. All I can do is come up with my own opinion about their story and go from there. I read several of her books, and the last one that I tried to finish I was not able to finish. I felt really uneasy about it and I decided not to finish so I took it back to the library. I have done my research on Mary K. Baxter and found several websites about her that I thought were very interesting.
http://www.jesus-is-savior.com/Wolves/mary_k_baxter.htm