I'm about half way through chapter 4 (pg 280 exactly) of Hyperion and it actually made me tear up 🥺😢. This character's kid starts to age backward and the chapter seems to be explaining everything from when that started until now. It starts when she is 25 and I'm at 13 now in the chapter but presently time in the book she is a baby again. Everyday she forgets what happened the day before. And every new day she thinks she is going to do something, like write a test or tryout for something or visit someone, but it actually happened like 10 years ago. The parents have to keep disappointing her that no this isn't going to happen because you're sick. The next day she doesn't remember and thinks something else is happening. She also is shocked everyday how old her parents are, because she remembers them from her age but when she sees them every morning they are actually 20 years older. The father even calls her "kiddo" which is what I call my daughters. I sure hope it ends well for them. Again, if you are into science fiction this is a must read.