This book is a guide for the 'dead' during the intermediate stages between death and rebirth. The Tibetan Buddhists believe that as soon as physical death takes place the spirit goes into a 'trance state' during which time it is disorientated and the person is not aware that they have died. This period is called 'The First Bardo'. Toward the end of this period the person sees a bright light and if they can embrace this light without fear, they will be freed from the cycle of rebirth. Most people fear this light and in doing so enter a state called the Second Bardo. in this state they experience a past-life review whereby they are shown the things that they may have done wrong giving them an opportunity to put this things right in their next incarnation.
Now this is is very interesting when viewed in the light of CTF. CTF suggests that there is a period between apparent death and real death. According to CTF this period is filled with a virtual-reality re-run of the person's life, something that I term The Bohmian IMAX. This is identical to that described in the Second Bardo. Now here is where CTF and The Thodol are amazingly similar; I suggest that the first and second Bardos happen consecutively in that the First Bardo (being in a state of trance and unknowing) is experienced by the Eidolon and the simultaneous Second Bardo is experienced by the Daemon (the aware part of consciousness that takes on board the events being experienced by the blissfully unaware Eidolon)
At the end of the past-life review, according to the Thodol, the Daemon is given the choice of entering the light and dying a second time (and in doing so move on into the Spirit World) or to again turn away from the light and return to another re-run of the Bohmian IMAX. Now an interesting question. Clearly this decision is made by the 'aware' part of consciousness (The Daemon) not the unaware part (the Eidolon). The Daemon will carry the memories of all the past re-runs and will know if it is ready to move on or not. This decision may be made many times, and many times the Daemon may consider that it's Eidolon is not yet ready and has more learning experiences needed.
Could this be the answer to the previous posting? If the realm of Spirit is timeless then those who have passed on through the Light may communicate through mediums given the right circumstances. In their universe, and timelessness, they may have lived a thousand lives in the twinkling of an eye. As such, and in our time perception, they may have only recently died.