A cardiologist friend of mine in Denmark had many of the patients he resuscitated tell him about leaving their bodies. He did an extensive study, interviewing hundreds of these patients and found that 18% remembered an out of body experience after death.
His work was well done and published in the medical journal Lancet in 2001. His name is Pim van Lommel.
There are so many books about surviving death and out of body experiences.
Life After Life by Dr. Raymond A. Moody Jr. is a great start on this subject. He is considered the ‘Father’ of the NDE Near Death Experience.
His latest book is called Glimpses of Eternity.