Investigation of AVPs during NDEs has been the subject of much experimental and phenomenological research in the field since 1988, including by NDE researchers Jan Holden, Bruce Greyson, Ken Ring, Michael Sabom, Sam Parnia, Peter Fenwick, Penny Sartori, Pim van Lommel and Kim Clark Sharp. This evidence has also been used by many other NDE researchers in theoretical arguments about the nature of consciousness. The on-going AWARE (AWAreness during REsuscitation) study, a multi-hospital study of NDEs during cardiac arrest, led by Sam Parnia, has a major objective of detecting possible AVPs of hidden visual targets.
Until the book by Rivas, Dirven and Smit, there was no phenomenological analysis whatever of the collection of AVP cases. The debates in the literature about AVPs have focused mostly on three well-known cases: Maria’s shoe case, the dentures case and the Pam Reynolds case. Skeptics have never been confronted by the full range of AVP cases.
This book presents a strong case for the validity of non-physical explanations of AVPs. First of all, it includes only cases of AVPs that were independently verified to researchers by another person. These cases are not simply anecdotes—stories repeated from one person to another—but rather cases that have been studied and thoroughly vetted. Furthermore, the book includes a number of important later cases of AVPs that were not included in earlier analysis, for example, the case of Dr. Lloyd Rudy’s patient.
More importantly, the book provides the significant details of the cases and divides them into different phenomenological categories, such as perceptions during cardiac arrest, perceptions outside the reach of physical senses and manifestations of the NDEr to other people. The phenomenological clusters of several cases considered together allow a more thorough examination of possible causes. Physical explanations that cover all cases of a particular type then become more difficult to devise. Indeed, this book poses a real challenge to a number of the favorite physical explanations of AVPs. The fact that each case has third-party corroboration makes it difficult to argue that the perceptions were due to hallucinations, fabrication or confabulation of information derived from other sources.
In light of this, it is clear that this book is a very important contribution to the field of near-death studies and its translation into English was crucial to allow its full impact to be felt in the field. The publication in Spanish will expand the reach of its influence to a significant number of additional people.

In 2013, NDE researchers Titus Rivas, Anny Dirven and Rudolf Smit from the Netherlands published