Look Back All the Green Valley

I liked the first two-thirds of this book, when it revolved around a son's attempt to find out more about his deceased father's inner thoughts. Abruptly it changed into a sci-fi book with a flashback (I think) to when the family went on a trip to the moon via the father's homemade spaceship. This incident wasn't mentioned again, and could easily be lifted out of the book without causing any plot disruptions.

Overall I think the book was mediocre, and putting in a random chapter that was pure sci-fi did nothing to make things better.