Very interesting, although you may doubt some of the stories presented in the book !
William Barrett spent his life doing psychical research. He was interested in proving the existence of a spiritual world. In this book, he brings very interesting stories that occurred during the last moments of certain people. He touched on a very mysterious subject, which is "what happens to us during our death?" What do people see in their last moments in this earth? Do they see their families, angles, etc? Hence, he presents various cases where he tried to prove the existence of the other life !
This is how Barret saw the matter:
I am personally convinced that the evidence we have published decidedly demonstrates (1) the existence of a spiritual world, (2) survival after death, and (3) of occasional communication from those who have passed over… It is however hardly possible to convey to others who have not had a similar experience an adequate idea of the strength and cumulative force of the evidence that has compelled my belief…. In fact I began the whole investigation of these phenomena convinced that [mal-observation or hallucination] was their true explanation, and it was not until after stretching this hypothesis to illegitimate lengths that I found the actual facts completely shattered my theory
Interesting book