A review by sonshinelibrarian
The Golden Mean: In Which the Extraordinary Correspondence of Griffin & Sabine Concludes by Nick Bantock

3.25

I definitely enjoyed this the least of the three. The ending is the main reason. I'll put my reason under a spoiler warning here:

The thing I love about the first two books is that you really are left wondering whether there is a Sabine, if this is all in Griffin's head, what the truth is. This one eliminates so much of the mystery and ambiguity by the postscript and it made me annoyed.