Honourable mentions

Another three books that didn't make my top five for 2017 probably should have.  These are:

Clade, by James Bradley. Published by Titan Books (@cityoftongues)

Darwin's Unfinished Symphony, by Kevin N. Laland. Published by Princeton University Press. (@PrincetonUPress)

A Game of Ghosts, by John Connolly.  Published by Hodder & Stoughton.

My goal is to produce a review of each of these books (in addition to the actual top five) by 1 Jan 2018.