A review by ergative
Sashay to the Centre of the Earth by Chris McCrudden

2.5

 Ah, this was a disappointment. The series went on a bit too long, the brilliance of the world-building was already played out, the wit and zing of puns and commentary on machines and technology to humanity was missing, and even the title didn't particularly work very well. After all the camp and drag of Danny's character arc in the previous two books, he was barely present in this one, and the title was justified by something that seemed forced---as if the title was decided well before the final book was written, and McCrudden couldn't make it work as originally envisaged. Many of the characters from the previous books just didn't feature at all in this one (e.g., Danny), and even the ones who did recur (Pam, Janice, Rita, Fuji, Soonyo) seemed to lack a lot of the characterization that made them so memorable. Janice wasn't viewing the world in terms of hair; Rita wasn't viewing it in terms of taxi dispatch, Pam wasn't viewing it in terms of breadmaking; Fuji in terms of printing, and Soonyo in terms of clocking. There were comments about it, sure, but their worldviews seemed a lot less foundationally affected by their professions or machine functions than they had in the previous books, and that fundamental effect on one's perspective was part of what made those books work so well. 

Also, if the nanobots were sentient voting machines in the last book, why was no one attempting to talk to them--even Fuji, who enfranchised them in the last book? They suddenly became an unstoppable dangerous mass once more.

All in all, the series would have been better off as a duology than a trilogy.