I imagine it will be exactly like before I was born. Just a void without any feelings. Calm and peaceful. No fear or pain or thoughts of any kind. I liked it that way more than how it is now. I don't fear being dead, but I do fear that my death will be painful.
Plus, the author of that book, Jim Tucker, has no idea of what he's talking about. This is from wikipedia: "Critics have argued there is no material explanation for the survival of self, but Tucker suggests that quantum mechanics may offer a mechanism by which memories and emotions could carry over from one life to another."
He's a guy with a degree in psychiatry and is talking about "quantum mechanics". Sounds to me like he just makes stuff up. MEMORIES AND EMOTIONS CARRY OVER THROUGH QUANTUM MECHANICS? LOL. Unless I get some proof of god(s) or the afterlife from a scientist (preferably with actual recorded and reproduceable evidence) I'm gonna pass on this spiritual stuff. It's all just anecdotal evidence (aka not real evidence) with he said/she said. My grandma and parents believe in this crap too plus a dozen other conspiracy theories. When I ask my grandma for evidence she just links me to some facebook post, lol.
But if reincarnation is real and I get to remember my past life, I will work very hard to get access to the nuclear codes and wipe out all life on this planet. Can't let this crap go on.
I made the mistake of reading the Amazon reviews for Tucker's book. 90% rated it 4 stars or more. This is how I know humanity is doomed. "Scientific evidence suggests consciousness survives death," says one of the reviews. I don't know how they came to that conclusion.