About 12 years ago I read a book about a new form of computing (quantum computer) and the ability to use these to communicate with the soul. I cannot for the life of me remember the title, but I can remember aspects.
In the book there is a religious opposition to the use of the computers, but ultimately the computer gets used to communicate with a dead person's soul and witness the 'afterlife'... I only remember sketchy parts but I am sure at the end the person whose soul links with the computer sees 'hell' or 'the devil'... or something like that... I also think the name of The book has the word 'light' in it..
Please please please can you help me identify the book?
His Dark Materials
trilogy, particularly the second bookThe Subtle Knife
, but it doesn't really fit the rest of your question.